Work in pairs.
"en" means "in" or "on"
'en un' = 'in a'
en el = in/on the
in
The cast of Club De Intercambio De Parejas En Barcelona - 2007 includes: Ryn Osky Bryan Da Ferro Yaiza del Mar Soraya Rico Ana Ros
"Hablas en español" means "Do you speak in Spanish?" in English.
Contented en Spanish is: contentos.
"Vino en" can mean either "wine in" or "he (or she) came in," but it would not be the end of the sentence in Spanish.
In our(s)
brightness in
en tu pagina is Spanish for in your page
I will assume you mean "What is 'can you write in Spanish?' translated into Spanish". The phrase in Spanish is "¿Puedes escribir en español?".