Is "Have a gentle day" a haitian creole expression?

No, not really.

They would say:

Have a great/good day!

Pase yon bon jounen!

Have a peaceful day!

Pase yon jounen pezib!

Have a beautiful day!

Pase yon bèl jounen!

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Do you want to spend the night? (Translation)

Eske ou ta renmen pase nwit la?
Eske ou vle pase nwit la?

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obey

obeyi

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you are beautiful

You are beautiful.

Ou bèl.

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how to say "you're foolish!"

You're foolish..

Ou pa byen nan tèt.

Ou pèdi la rezon.

Ou fou

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how to ask do i need a prescription for

I need a prescription for...

Mwen bezwen yon preskripsyon pou...

I need a prescription for an antibiotic.

Mwen bezwen yon preskripsyon pou yon antibyotik.

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"still". I am still tired.

Still → toujou

I am still tired. → Mwen toujou fatige a wi.

I am alwyas tired. → Mwen toujou fatige.

I get tired often. → Mwe fatige souvan.

Another word for "tired" in Haitian Creole is "bouke". You will hear it very often.

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how to say drive safe in creole

Drive safe.

Kondwi byen

Kondwi avèk prekosyon.

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I was here in June.

I was here in June.

Mwen te isit la an Jen. or

Mwen te isit la nan mwa Jen.

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expertise, overturned, vigilant, kreole translation.

Expertise → espesyalite
overturned → chavire
Vigilant → vijlan, veyatif, an gad

Example:

What is you expertise?

Ki espesyalite w?

The truck overturned on the road.

Kamyon an chavire sou wout la.

Be vigilant.

Rete vijilan.  or

Mete w an gad.  or

Se pou ou veyatif.

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Gade'm gade'w gade li.

Gade m. → Look at me.

Gade w. → Look at you.

Gade li. → Look at it/him/her

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"That's not nice!" or "That's not a nice thing to say!"

That's not nice! → Sa pa janti!, Sa pa de byen!

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how to you say "till next time!"?

Till next time! → pwochèn fwa!, a la pwochèn!,
Another time → yon lòt fwa

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What's the best way to say "as....as" as in "She's not as big as he is."

as ... as → tankou, menm jan ak

tankou and menm jan means same as, just like, equal to

You're as tall as your dad.

Ou wo tankou papa w. or

Ou wo menm jan ak papa w.

(literally: you tall same as your dad)

You're as guilty as her.

Ou koupab tankou li.  or

Ou koupab menm jan ak li.

(literally: you guilty same as her)

My son is as smart as your daughter.

Pitit gason mwen intelijan tankou pitit fi ou.  or

Pitit gason mwen intelijan menm jan ak pitit fi ou.

(literally: my son smart same as your daughter)

You're not as bad a person as he is.
Ou pa move moun tankou li.
Ou pa move moun menm jan ak li.
(literally: you not bad person same as him)

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How do you say "most of what" as in I understood most of what he said?

Most of → anpil nan (a lot of),  preske tout (almost all)

I understood most of what he said.

Mwen konprann preske tout sa li di.  or

Mwen konprann anpil nan sa li di.

I ate most of the food.

Mwen manje preske tout manje a. or

Mwen manje anpil nan manje a.

They stole most of what I had.
Yo vòlè preske tout sa m te genyen.
Yo vòlè anpil nan sa m te genyen.

I spent most of my money on my kids education.
Mwen depanse preske tout lajan m pou edikasyon pitit mwen.
Mwen depanse anpil nan lajan m pou edikasyon pitit mwen.

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