"Croeso!"

Translation: Welcome!

[RyanOkushi]

Welcome! to Duolingo, Welsh. :)

[HeruMornie]

Is it used the same as in English? I mean, both for greeting (e.g. upon arrival) and as a reply for thanks? (In my language these two are completely different.)

[ElectricHare]

Yes you can use it for both like English.

[Molly-moos]

Good point

[PurpleQuak]

Yes

[Guydzak]

How's the o at the end supposed to be pronounced?

[samstyan99]

like the 'o' in 'robOt' or 'cOt'. Don't pronounce it like the long 'o' in 'bOAt' or 'thOUGH'.

[Jackel98]

Like the au in caught or the ou in bought or brought.