[pvaldes]

Language is often linked with the world of the mother. The masculine term is more formal

In spanish and english there are a version masculine (El lenguaje / The language) and other feminine (La lengua / The tongue) with subtle differences in meaning but equivalent basically. The feminine term is polysemic.

It seems that French use only the second version, in a polysemic sense also.

[simias]

French has both as well, "la langue" (the tongue, both the organ and the spoken word) and "le langage" (the language).

We only use "langue" for natural (for lack of a better word) languages. Programming languages are always "langages de programmation". I believe that the usage is strictly the same in English (you wouldn't lay "a programming tongue" either).

[boobsbr]

In Portugese, both a linguagem and a língua are feminine.