notadictionary.com
ya une fille dma classe qui s'appelle Jeanne lprof il lui a dit "t'es tout en noir aujrd'hui" elle a rep "chui Jeanne dark"
→ “There's a girl in my class named Jeanne, the teacher told her 'You're all in black today' and she replied 'I'm Jeanne Dark'”
ya — there is / there's (colloquial contraction of 'il y a')
une fille — girl
dma — my class (colloquial abbreviation for 'de ma classe')
classe — class
qui — who / that (relative pronoun)
s'appelle — is called / goes by (reflexive verb: s'appeler, present tense, 3rd-p. singular)
Jeanne — Jeanne (proper noun, name)
lprof — the teacher (colloquial abbreviation for 'le professeur')
il lui — her / to her (indirect object pronoun)
a — has / did (auxiliary verb 'avoir', past tense, 3rd-p. singular)
dit — said (past participle of 'dire', used with 'a' to form passé composé)
"t'es — you are (colloquial contraction of 'tu es')
tout — all / entirely
en — in / wearing (preposition indicating material or state)
noir — black (adjective)
aujrd'hui — today (colloquial abbreviation for 'aujourd'hui')
"elle — she (subject pronoun)
a — did / has (auxiliary verb 'avoir', past tense, 3rd-p. singular)
rep — replied (colloquial abbreviation for 'répondu')
"chui — I am (colloquial contraction of 'je suis')
Jeanne — Jeanne (proper noun, name)
dark — Dark (English loanword, referring to the comic character)