"Thank you, and have a nice weekend."

Translation: Děkuji a hezký víkend.

[Thijs0806]

How do you pronounce ě?

[ChudyBohac]

It's pronounced like the "ye" in "yesterday."
*Note: When "ě" follows the letter "m", it is pronounced as if there was a letter "n" between them. For example, the word "měkký" means "soft" and is pronounced "mněkký."

[VladaFu]

Well, not only that. In this very case "děkuji" is pronounced as [ď e k u j i], so the "d" is palatalized and the "e" is quite the ordinary [e].

[VladaFu]

See the Tips and notes or the Wikipedia article about Czech phonology.

[Bsoluco]

When should I use Dekují and Diký?

[VladaFu]

Děkuji is more formal than Díky. Děkuju is in between and is very universal.

[Bsoluco]

Ok! Děkuju!

[Raquelmlichs]

With friends or family, we use diky (like slovakia)

[AgnusOinas]

"Díky" is common in Czechia. It's "vďaka" in Slovak. AFAIK, using "díky" is a bohemism in Slovak (practically a loanword from Czech).

[yoncho3]

Its "díky" not diký,
And díky is slange its just a short version of thank you.
Děkuji is the full version.

[Alois1488]

Why is the "a" pronounced velke a or is that an error with the app?

[VladaFu]

the latter, no need to report

[eugrus]

Should "díky a dobry víkend" be ok?

[VladaFu]

No, no-one says dobrý víkend.

[lcving-czech]

"Dobrý víkend" litterally means "good weekend". That wouldn't be logical. "Hezký víkend" is better, because it means "have a nice weekend", even though "have a good weekend" sounds natural in English. Czech is very different.

[Deuxy1]

Melo by to byt dekuji a mejte hezky den

[VladaFu]

No, mějte hezký den is not used in Czech and it is an ugly anglicism.

[GoldenAueen]

Well... Have a "dobrý" večer))