English Reference

A teacher's guide

English for French speakers

No language has left a bigger mark on English than French. After 1066, Norman French was the language of the English court, the law, and the kitchen for three hundred years, and English absorbed it wholesale. Estimates vary, but somewhere between a quarter and a third of the English lexicon traces back to French — which means a French speaker walks into your classroom already able to read a great deal of English before the first lesson.

That inheritance is a gift with strings attached. The borrowed words drifted in meaning, kept their French spelling but lost their French pronunciation, and settled into a formal register that makes a French speaker's English sound oddly stiff. This guide covers only what is specific to French speakers — the shortcuts their first language hands them and the traps it quietly sets. General English grammar that every learner faces is left out on purpose.

Part I

The head start they already have

The shared vocabulary students can read and guess before you teach a thing.

1. French → English word transformation rules

A large share of English vocabulary can be predicted from French. Because the words crossed the Channel as a block, their endings correspond with striking regularity. Once students internalise these patterns they stop memorising individual words and start converting them — one of the highest-leverage things you can teach early.

French word endings and the English endings they usually convert to.
French endingEnglish endingExample
-tion -tion nation → nation, information → information
-ité -ity liberté → liberty, université → university
-té -ty beauté → beauty, difficulté → difficulty
-eur -or / -er acteur → actor, professeur → professor
-aire -ary nécessaire → necessary, dictionnaire → dictionary
-ique -ic / -ical économique → economic, politique → political
-eux / -euse -ous généreux → generous, dangereux → dangerous
-if / -ive -ive actif → active, créatif → creative
-ance / -ence -ance / -ence différence → difference
-iste -ist artiste → artist, journaliste → journalist
-iser -ize / -ise organiser → organize
-ment -ly rapidement → rapidly
-phie / -phe -phy / -ph photographie → photography

Present it as a conversion ladder — the meaning stays; only the ending shifts:

   French               English
   information    →     information
   université     →     university
   généreux       →     generous
   économique     →     economic
   révolutionnaire →    revolutionary

One caveat to flag for students. The pattern predicts spelling and meaning, not pronunciation, and not every word obeys — librairie looks as if it should become library and does not (see §8). Teach the rules as a strong first guess, then confirm. They are right far more often than wrong, which is exactly why they are worth drilling.

2. Cognates

A cognate shares an ancestor in two languages and still looks and means roughly the same. English and French have them by the thousand — often with no spelling change at all, because English took the French word as it stood. It helps students to sort them into three groups.

Perfect cognates — identical spelling and meaning:

nation · question · table · village · orange · science · nature · animal · social · certain · impossible · train

Near cognates — small, predictable spelling changes, same meaning:

FrenchEnglish
liberté liberty
nécessaire necessary
différence difference
exemple example
développement development
adresse address

The exceptions to watch — words that look cognate but are not (the false friends of §8). Minuteminute is a true cognate; librairielibrary is not (it means bookshop). The habit to build: when a student meets an unfamiliar English word with a French shape, their first guess should be the cognate meaning — with the false-friend list kept in reserve.

3. The Norman layer: English's two vocabularies

After the Conquest, English ended up with two words for a great many ideas: the Old English one, kept by the people who did the work, and the French one, used by the people who gave the orders. Both survived. The Germanic word is everyday and blunt; the French word is formal and careful. Your students already own the second column.

Germanic (everyday)French (formal)Students already know
help aid aider
begin commence commencer
end finish finir
buy purchase
wish desire désirer
freedom liberty liberté
forgive pardon pardonner
weak feeble faible

The classic illustration is the farmyard: the living animal keeps its English name (cow, pig, sheep), while the meat on the table takes the French one (beefbœuf, pork porc, muttonmouton). Worth naming in class, because it explains the whole register system in one image — and it warns students that reaching for the French-looking word raises the formality every time.

4. Recognising academic English

The same advantage scales up. The core vocabulary of essays, research, law, and medicine is overwhelmingly French and Latin in origin.

analyse · interpret · establish · determine · significant · consequence · evidence · concept · justify · demonstrate

For most learners, academic vocabulary is the last mountain. For French speakers, much of it is already familiar terrain — a native English child meets these words later than the Germanic ones and finds them harder. Your students have the usual difficulty curve reversed, and that is a resource worth exploiting when you choose reading texts. When students report understanding more of an academic paper than a soap opera, that is not a fluke; name it for them so they stop second-guessing it.

5. English words that are still visibly French

Beyond the Norman layer, English has kept borrowing from French — in food, fashion, diplomacy, and the arts — and these later loans never got anglicised at all. They keep their French spelling, and sometimes their accents.

café · genre · cliché · rendezvous · entrepreneur · déjà vu · ballet · bouquet · fiancé · souvenir · encore · résumé · liaison · avant-garde

Students recognise every one of these on sight, which is a genuine confidence win. The catch is pronunciation: English says them its own way, with the stress moved and the nasal vowels flattened (ballet is BAL-ay in Britain, ba-LAY in America; neither is French). Treat them as English words that happen to be spelled in French — a short drill is usually enough.

6. French words borrowed from English — and the false ones

Traffic runs both ways. Modern French has absorbed a wave of English words, especially in business and technology:

le week-end · le marketing · le shopping · un mail · le stress · le parking · le business · cool

These are mostly free vocabulary — but French has also invented English-looking words that no English speaker uses, and students assume they are safe. These faux anglicismes deserve a slide of their own:

  • un smoking is a dinner jacket or tuxedo, not smoking.
  • le footing is jogging.
  • un baby-foot is table football or foosball.
  • un relooking is a makeover.
  • un brushing is a blow-dry.

The pronunciation students learned in French is also usually not the English one — the stress shifts and the final consonants change. In English they need to reset rather than carrying the French version across.

7. Thousands of words they already know

This is the point to return to whenever a class feels discouraged. Because so much of English came through French, an educated French speaker already recognises a very large slice of the vocabulary. Students do not need to learn these words — they need to unlock them, using tools already in this guide:

  • Transformation rules (§1) convert French endings into English ones.
  • Prefixes carry across almost unchanged: pré-, re-, in-/im-, trans-, sous-/sub-, inter-, anti-.
  • Suffixes convert predictably: -ité → -ity, -eux → -ous, -aire → -ary.
  • Roots are shared: port (carry), dict (say), spect (look), scrib (write).

A strategy worth teaching: before reaching for a dictionary, break the word into prefix + root + suffix and ask what the French cousin would be. Inevitable = in- (not) + évit (avoid, éviter) + -able — decoded on sight. For a French speaker, English is not an entirely foreign language; it is one that borrowed a third of its vocabulary from theirs.

Part II

The traps

The very similarity that helps students also lays a few traps — places where a familiar-looking word betrays them.

8. False friends (faux amis)

A false friend looks like a French word but means something else — usually because the shared ancestor drifted on one side of the Channel and not the other. These cause more errors, and more embarrassment, than any genuinely hard vocabulary, precisely because they feel safe. They deserve explicit teaching time.

Common English–French false friends and the French words learners confuse them with.
English wordStudents expectIt actually meansThey meant
actually actuellement (currently) in fact, in reality currently
eventually éventuellement (possibly) in the end, finally possibly / if need be
library librairie (bookshop) place you borrow books bookshop
sensible sensible (sensitive) practical, reasonable sensitive
demand demander (to ask) to insist on, to require to ask
attend attendre (to wait) to go to, to be present at to wait
assist assister à (to attend) to help to attend
deception déception (disappointment) trickery, being misled disappointment
journey journée (a day) a trip day
support supporter (to put up with) to back, to help to bear, to put up with
sympathetic sympathique (likeable) showing understanding nice, friendly
college collège (middle school) higher education secondary school
resume résumer (to summarise) to start again to summarise
location location (a rental) a place rental, hire
large large (wide) big wide
chance chance (luck) opportunity, possibility luck
  • actually ≠ actuellement. Actually means in fact; the word for actuellement is currently. This pair alone accounts for a startling share of confused meetings.
  • attend ≠ attendre. “I attended the bus” is a very common early sentence, and it means something quite different.
  • preservative ≠ préservatif. Warn the class before someone reads a food label aloud — a préservatif is a condom; the English food additive is a preservative.

Don't drown students in the full list at once. Teach this core set, and cultivate a mild suspicion whenever a French-looking English word solves a problem too conveniently.

9. Common direct-translation mistakes

Some errors come not from a single word but from translating a whole French structure. The most common cluster around one difference: French uses avoir (to have) where English uses to be.

French logicWord-for-wordNatural English
J'ai 20 ans. ✕ I have 20 years. I am 20 years old.
J'ai faim. ✕ I have hunger. I am hungry.
J'ai raison. ✕ I have reason. I am right.
J'ai froid. ✕ I have cold. I am cold.
J'ai sommeil. ✕ I have sleep. I am sleepy.
J'ai peur. ✕ I have fear. I am afraid.
  • ✕ “I am agree”“I agree” (d'accord is an adjective phrase; agree is a verb).
  • ✕ “It depends of”“It depends on.”
  • ✕ “Explain me the rule”“Explain the rule to me.”
  • ✕ “I have 20 years old” — the halfway hybrid, and the surest sign the avoir habit is still live.

The fix students need is a habit, not a rule: when a sentence describes a state a person feels (age, hunger, cold, fear, being right), English reaches for to be, not to have.

10. Translation traps

Some very common French expressions cannot cross into English word for word at all — they need a different structure entirely. Good candidates for a dedicated drill.

FrenchLiteralNatural English
Il fait froid. ✕ It makes cold. It's cold.
Il y a deux ans… ✕ There is two years… Two years ago…
Ça fait trois ans que je suis ici. ✕ It makes three years that I am here. I've been here for three years.
Tu me manques. ✕ You miss me. I miss you.
J'ai mal à la tête. ✕ I have bad at the head. I have a headache.
Je m'appelle Marie. ✕ I call myself Marie. My name is Marie.
Ça me plaît. ✕ It pleases me. I like it.
J'ai envie de… ✕ I have desire of… I feel like / I want to…
Je suis en train de manger. ✕ I am in the train of eating. I'm eating.

Watch manquer especially. It reverses the subject and object: tu me manques is literally “you are missing to me,” so students confidently say “you miss me” when they mean “I miss you” — and no one in the room notices the misunderstanding. Teach students to spot when they are about to translate il y a, ça fait, il fait, or manquer directly, and to ask instead what an English speaker would say, not what the words are.

Part III

Grammar that works differently

Structural habits where French and English part ways. None are hard once seen — but each is invisible until named. Naming the pattern is half the lesson.

11. Articles: French vs English

French requires an article almost everywhere — definite (le, la, les) for general and abstract nouns, partitive (du, de la, des) for unspecified quantities. English strips both away in exactly those cases. The rule of thumb to teach: when the meaning is a category, an idea in general, or an unmeasured amount, English uses no article at all.

MeaningFrenchEnglish
People in general Les gens People
Life in general La vie Life
Love as a concept L'amour Love
Coffee in general Le café Coffee
Dogs as a species Les chiens Dogs
An unspecified amount Du pain, de l'eau Bread, water (or some bread)
   General idea →  NO article in English
   Les gens        People
   La vie          Life
   Les chiens      Dogs
   Du pain         Bread

   Specific thing → article stays
   Les gens d'ici       The people here
   La vie que je mène   The life I lead

The article returns the moment the noun is specified: “The people here are friendly.” Keep the two cases separate and most article errors disappear.

12. When English omits words French requires

Because this is the single most frequent article error for French speakers, it earns its own examples. When the topic is something in general, the article is dropped:

  • ✅ I like coffee. (not the coffee — unless a specific cup)
  • School starts tomorrow.
  • Life is beautiful.
  • ✅ I study English.
  • Cats are independent.
  • ✅ We bought bread and cheese. (du pain et du fromage)

“I like the coffee” tells an English speaker the student is pointing at one particular coffee on the table. “I like coffee” says they enjoy it as a thing — a useful contrast to make explicit in class.

13. When English requires words French omits

The reverse also happens. Do-support is the big one: English builds questions and negatives with a helper verb that French has no equivalent for. French either inverts (aimes-tu ?), adds est-ce que, or just raises the intonation — so students produce “You like coffee?” and “I not know.”

FrenchEnglish
Tu aimes le café ? Do you like coffee?
Je ne sais pas. I don't know.
Où habites-tu ? Where do you live?
Je n'y suis pas allé. I didn't go.

In English this is not optional — a required do left out sounds broken, and a question asked by intonation alone reads as surprise rather than enquiry. Build the habit early: question or negative → is a helper verb needed? The same gap explains missing dummy subjects: French says il faut partir, English insists on “We have to go” or “It is necessary to go.”

14. Tense and aspect: the two biggest gaps

First, the continuous. French has one present tense doing two jobs. English splits them, and the split is compulsory — using the simple present for something happening right now is one of the most persistent French errors at every level.

One French formEnglish: a habitEnglish: right now
Je travaille. I work. (every day) I'm working. (right now)
Il pleut. It rains. (in November) It's raining. (look outside)
Elle lit. She reads. (she's a reader) She's reading. (don't disturb her)

Second, depuis and the present perfect. French describes an ongoing situation with the present tense plus depuis; English needs a perfect form. And the passé composé, which looks exactly like the present perfect, is used where English wants a simple past.

FrenchWord-for-wordNatural English
Je vis ici depuis trois ans. ✕ I live here since three years. I've lived here for three years.
J'apprends l'anglais depuis 2020. ✕ I learn English since 2020. I've been learning English since 2020.
Je l'ai vu hier. ✕ I have seen him yesterday. I saw him yesterday.

The rule that does the most work: if the sentence carries a finished time expression — yesterday, last week, in 2019, hier — English uses the simple past, no matter what the French auxiliary looks like. The present perfect is for time that is still open.

15. Verbs that work differently

Several core French verbs split into two or more English verbs, and one English verb has no French equivalent at all. faire → do vs make. French uses faire for both; broadly, English uses do for activities and unnamed tasks, and make for creating or producing something:

domake
do homework make a decision
do the washing-up make a mistake
do sport make dinner
do business make friends

savoir vs connaître is a rare case where English is simpler — both are know, so students never have to choose. get runs the other way: it has no clean French equivalent, stretching across obtenir, devenir, arriver, recevoir, comprendre (get a job, get angry, get home, get a letter, get it). Present it as a family of meanings learned through examples, not a translation. And bring vs take divides what French handles with apporter and emporter: bring is movement toward the speaker, take is movement away.

16. Prepositions French speakers commonly confuse

Prepositions rarely map one-to-one, and English draws lines French does not — or drops a preposition French insists on. These are the pairs that cause the most trouble:

ConfusionRule of thumbExample
for vs since French uses depuis for both; for + a length of time, since + a starting point for three years / since 2020
in vs on vs at in = enclosed/large; on = surface; at = a point in the room / on the table / at the door
depend on dépendre de tempts depend of It depends on you.
interested in intéressé par tempts interested by I'm interested in music.
married to marié avec tempts married with She's married to Paul.
arrive at / in arriver à tempts arrive to arrive at the station / in Paris
no preposition at all répondre à, téléphoner à, discuter de all lose theirs answer the question / phone your mother / discuss the plan
in the photo sur la photo tempts on the photo Who's in this photo?

Time and place prepositions (in / on / at) deserve special attention, because French spreads à, en, and dans across the same ground differently. There is no shortcut except exposure and a memorised core: at a time, on a day, in a month or year — at 3 o'clock, on Monday, in June.

17. French interference

“Interference” is the linguist's word for the moment French grammar leaks into a student's English. It is completely normal — every learner does it — and naming the patterns is the fastest way to help students catch themselves.

In grammar

  • Adjective placementune voiture rougea red car; “a car red” is a classic tell.
  • Overusing articles — “The life is hard.”
  • “I am agree” — the adjective habit from être d'accord.
  • Simple present for now — “I read a book at the moment.”
  • Register drift — reaching for the French-looking word, so everything sounds like a legal notice.

In pronunciation

  • Dropping the H — “'appy 'oliday” — then over-correcting it onto vowels.
  • TH → S or Z — “sink” for think, “zis” for this.
  • Even stress — every syllable given equal weight, with the beat on the last.
  • Ship / sheep — one vowel where English has two.

The register point is worth dwelling on, because it is invisible to the student. A French speaker with good vocabulary will say “I will assist to the meeting and afterwards I shall verify the document” — every word reachable from French, and the whole sentence three registers too high. The fix is not more vocabulary but the Germanic and phrasal alternatives of §25.

Part IV

Sounds and spelling

French and English share a great deal of spelling and almost none of the sound system. French is syllable-timed with the beat on the last syllable; English is stress-timed and swallows everything around the strong beat. Here are the parts that are hard because French never trained the ear or mouth for them.

18. Pronunciation problems for French speakers

Sounds that either do not exist in French or behave differently. Work on them in roughly this order — the first few carry the most weight.

Sound / featureThe difficultyWatch word
TH /θ/ and /ð/ No th in French; comes out as /s/ or /z/ think → “sink”, this → “zis”
H /h/ Silent in French, so dropped — then over-corrected onto vowels house, hello, apple
/ɪ/ vs /iː/ French has one close front vowel, not two ship / sheep, live / leave
/æ/ No equivalent; collapses into French è cat, bad, man
/ʌ/ No equivalent; often becomes a or eu cup, but, love
/tʃ/ and /dʒ/ French has only /ʃ/ and /ʒ/ chair → “share”, judge
/ŋ/ French has nasal vowels, not a final -ng singing, thing
English R French r is made in the throat red, car
-ed endings One spelling, three sounds: /t/, /d/, /ɪd/ worked, played, wanted
Word stress French stresses the last syllable, evenly; English stress moves PHOtograph / phoTOGraphy
The schwa /ə/ French gives every syllable full weight about, teacher

The missing H is the single most recognisable feature of a French accent, and it fails in both directions:

   Dropped where it belongs:   house  →  "ouse"      ✗
                                happy  →  "appy"      ✗

   Added where it doesn't:     apple  →  "happle"    ✗
                               eat    →  "heat"      ✗

   The drill: hold a hand in front of the mouth.
   "house" should move the air. "our" should not.

Stress matters more than sounds. French places a light beat on the final syllable of each phrase and gives every other syllable equal weight. English picks one strong syllable per word and reduces the rest to schwa. A student who nails the stress pattern of comfortable and photography will sound more fluent than one who has perfected /θ/ but still says every syllable at the same volume.

19. Familiar words with different pronunciation

Thousands of words are spelled identically in both languages, which tempts students to keep the French pronunciation. The English version is genuinely different, and worth isolating.

WordFrench instinctEnglish reality
restaurant res-to-RAN (nasal, no final t) RES-tuh-ront
hotel o-TEL (silent h) ho-TEL (breathed h)
village vee-LAZH VILL-ij
image ee-MAZH IM-ij
nation na-SYON NAY-shun
question kes-TYON KWES-chun
orange o-RANZH OR-inj
menu muh-NU MEN-yoo
garage ga-RAZH GARR-ij (BrE) / guh-RAHZH (AmE)

Two forces act in every row: stress moves to the front, and the unstressed syllables collapse. Village and image are the clearest examples — same letters, but English lands hard on the first syllable and crushes the -age down to a mumbled -ij. The word's shape matters more than its individual sounds.

20. Words French speakers commonly mispronounce

Words that reliably cause trouble, and why. These reward drilling one at a time.

WordThe trapSays roughly
comfortable swallowed middle syllable KUMF-tuh-bl
vegetable swallowed middle syllable VEJ-tuh-bl
clothes the -thes cluster kloathz (near close)
iron the r hides EYE-ern
recipe the final -e is said, unlike French RESS-i-pee
women the first vowel flips WIM-in
squirrel squ + rr cluster SKWIRR-ul
world r + l together wurld (one syllable)

The theme repeats: English does not reward students for pronouncing every letter evenly. Often the correct pronunciation is less than the spelling promises, not more.

21. Common spelling problems

The shared vocabulary is a spelling trap as much as a gift, because the two languages double their consonants in different places. These are the ones that survive into advanced writing:

French words whose English cousins double or drop a letter.
FrenchEnglishThe shift
adresse address English doubles the d
appartement apartment English drops one p
exemple example e becomes a
développement development one p, no accents
littérature literature one t
trafic traffic English doubles the f
professionnel professional one n
responsable responsible -able becomes -ible
indépendant independent -ant becomes -ent
exercice exercise -ice becomes -ise

The -ough family is English at its least logical — one spelling, many sounds. The only remedy is learning each word individually:

WordRhymes with
enough / tough stuff
though go
through too
thought sort
cough off

One consolation for students taught British English: many BrE spellings are simply the French ones kept intact — centre, theatre, colour, programme. American English regularised them (center, theater, color, program), so a French speaker writing BrE has fewer decisions to make.

22. Silent letters — and the ones English insists on saying

French speakers are already comfortable with silent letters; the problem is that the two languages silence different ones. A few even match, which is worth pointing out as a freebie.

WordSilent letterSays
knife k nife
hour h our (as in heure)
honest h onest (as in honnête)
debt b det
climb b clime
psychology p sy-…
salmon l sam-on

The bigger trap runs the other way. French silences most final consonants; English pronounces them, and the difference is often the whole word:

   French drops the final consonant:  petit  →  "peti"
   English does not:                  cat    →  "cat"   (say the t)
                                      hard   →  "hard"  (say the d)
                                      cars   →  "cars"  (say the s)

   Lost endings cost grammar, not just sound:
   "walk" vs "walked"   "cat" vs "cats"   "he work" vs "he works"

Teach the silent letters by pattern — silent k before n (knife, knee, know), silent b after m (climb, thumb, comb) — and drill the final consonants as a grammar exercise, not a pronunciation one. When a student's plurals and past tenses go missing in speech, the cause is usually here.

Part V

Putting words together

Knowing words is not the same as knowing which words go together — the combinations where English simply chooses differently from French.

23. English collocations that feel strange

A collocation is a pair of words that habitually go together. Breaking one is not grammatically wrong — it just sounds foreign. The trouble is that English and French often pick different partner words for the same idea, and French leans especially hard on faire, prendre, and poser.

IdeaFrench instinctEnglish collocation
Intense rain pluie forte (strong) heavy rain
A serious error une grosse erreur (fat) a big mistake
Commit an error faire une erreur (do) make a mistake
Settle on a course prendre une décision (take) make a decision
Photograph something faire une photo (do) take a photo
Assigned schoolwork faire les devoirs do homework
Put a question poser une question (place) ask a question

There is no deep logic here — these are conventions. The way in is to teach the noun and its usual partner together: not rain but heavy rain; not mistake but make a mistake. Storing the pair costs no more than storing the noun.

24. Expressions that cannot be translated literally

Some everyday actions use fixed verb + noun combinations that will not survive a word-for-word translation. Each is best taught as a single unit:

have breakfast · take a shower · make a decision · pay attention · tell the truth · catch a bus

French reaches for prendre le petit déjeuner, prendre une douche, faire attention, dire la vérité, prendre le bus — and the pattern that emerges is that French uses two verbs where English uses six. The English verb is not something a student can reason toward; it is fixed by convention. When one comes up, store the whole phrase, verb included.

25. Phrasal verbs — and why French speakers avoid them

Phrasal verbs — a verb plus a particle like up, off, or over — are among the hardest parts of English, because the particle changes the meaning completely. French has nothing like them. What French does have is a single Latinate verb for each idea — and because English borrowed that verb too, students always have an escape route.

The formal verb they reach forWhat English actually saysFrench
postpone put off reporter
tolerate put up with supporter
extinguish put out éteindre
discover find out découvrir
continue carry on continuer
encounter run into rencontrer

This is why a French speaker's English can be simultaneously advanced and unnatural: “I will postpone the meeting” is correct, but a colleague would say “I'll put the meeting off.” The escape route always works, which is exactly why it needs closing — teach the phrasal verb as the default and keep the Latinate verb for writing. Grouping by base verb makes the load manageable:

Base verb: GET

Phrasal verbMeaningFrenchExample
get up rise from bed se lever I get up at seven.
get off leave a bus/train descendre Get off at the next stop.
get over recover from se remettre de She got over the flu.
get away escape s'échapper The thief got away.
get along have a good relationship s'entendre bien They get along well.

The same word, get, means five different things depending on the particle — which is exactly why phrasal verbs cannot be decoded from their parts. Teach them in sets like this one, with the French equivalent as an anchor, and the meanings stop feeling arbitrary.

26. English idioms compared with French idioms

An idiom is a phrase whose meaning cannot be worked out from its individual words. Both languages have thousands, and comparing them is genuinely enjoyable for a class — students often find French has an idiom for the same idea, sometimes with an almost identical image, sometimes with one gloriously unrelated.

Same idea, similar image:

EnglishFrenchShared image
Break the ice. Briser la glace. breaking ice
Turn the page. Tourner la page. turning a page

Same idea, different image:

EnglishFrenchLiteral French
It's raining cats and dogs. Il pleut des cordes. it's raining ropes
Once in a blue moon. Tous les trente-six du mois. every thirty-sixth of the month
It cost an arm and a leg. Ça coûte les yeux de la tête. it costs the eyes of the head
It's a piece of cake. C'est les doigts dans le nez. it's fingers up the nose
To have other fish to fry. Avoir d'autres chats à fouetter. to have other cats to whip

The lesson to drive home: never translate an idiom word for word. Students should learn the idea each idiom expresses and match it to the equivalent expression in the other language — the images are there to be enjoyed, not converted.

Part VI

One last difference: which English?

27. British vs American vocabulary

English is not one target. British and American English differ in spelling, pronunciation, and — most visibly — everyday vocabulary. Neither is “more correct”; what matters is being consistent and knowing that the same object has two common names.

The last two rows are a nice detail for a French class: where British English kept the French word, American English reached elsewhere — aubergine against eggplant, courgette against Italian zucchini. French schools generally teach British English, and BrE spelling and vocabulary are indeed the closer fit. But American English dominates film, technology, and much of the internet, so students will meet both constantly. Pick the variety that fits where the class is headed, keep it consistent, and make sure students can recognise the other.

Where this leaves you

A French-speaking class begins English with a third of the vocabulary already in hand, a set of rules for converting words they have never seen, and an instinctive grip on the formal register that other learners spend years acquiring. The genuine work is narrower than it first appears, and it is mostly about coming down from that register rather than climbing up to it: a list of false friends, the continuous and the perfect, a handful of sounds French never trained, and the phrasal verbs that make the difference between correct English and English someone would actually say. Teach the traps, drill the stress, and push students toward the plain Germanic word — they already have the fancy one.