"Byli jsme velmi rádi."

Translation: We were very glad.

[jphager2]

Can "happy" also be acceptable?

[JamesTWils]

In my dialect of English, they are precisely synonymous, so I'm suggesting that it should be.

[LetitiateT]

Yes. I wrote "happy" and it was accepted.

[stan602994]

What about we were glad very much? Could be OK?

[BoneheadBass]

No, that doesn't work in English.