Of course, we all speak the same language, Catalan/Valencian.
There are some people in Valencia, who, mainly for political reasons, claim that Valencian is a different language from Catalan. That's so stupid as stating that Americans do not speak English but American, which is not English or that Mexican is a different language from Spanish.
Yes, we can also understand the Balearic version, even if the pronunciation in some cases makes it a bit difficult to understand some words. It would be like someone from London listening to someone speaking an dialect from Northern England.
I suppose some people of the Southern France in the region of Languedoc-Roussillondo understand Catalan too...
English - Thank you / Catalan - Valencian - gràcies, mercès and merci (colloquialism) / French - Merci.
English - Goodbye! / Catalan - Valencian - adéu!, adéu-siau! and déu! (colloquialism) / French - au revoir and adieu.
Heu... Pardonez moi, Je viens de Paris....
Yes. Catalan, Valenciano, Mallorquin etc. are all Catalan. (They all speak Spanish too.)
Yes, of course.
And they all speak and understand castellano, as well.
When the speak Catalan/Valenciano? Do they understand the Balearic version?