SPANISH SPEAKERS - is this correct?

[Yankydoodledandy]

I want to say - Good luck but not sure about capital letters etc.

Is it A or B or either?

A. buena suerte
B. Buena suerte

Anyone?

If it's at the beginning of a sentence or a stand alone phrase then Buena suerte. If not, no need to capitalise.

You would only use a capital as we would in English, so at the start of a sentence etc.

You could also say muy buena suerte for added emphasis.

It;s stand alone so will just use B

thank you everyone

I'd add two exclamation marks, one upside down at the beginning.
¡Buena suerte!

Where I live it would more likely be "Mucha suerte!" or just "Suerte!"

OR, in the theatre, "Mucha mierda!" (but don't use that!)

Buena suerte is a little formal – so it would depend on who you're writing to