They all speak French.
Those people are speaking French.
Those people are speaking French.
They seldom, if ever, speak in French.
She can speak French.
Both of them can speak French.
Almost all of us can speak French.
They speak English or French or both.
All my friends speak French.
I don't think she can speak French.
Except for pronunciation, everyone can speak good French.
He can speak French, still more English.