In foreign languages the usage is somewhat different.

The following rules will be found useful: a.

Always capitalize the first word.
b.

In Latin capitalize only proper nouns and adjectives derived therefrom.
_Commentarii Caesaris de bello Gallico._ c.

In French, Italian, Spanish, Swedish, and Norwegian, capitalize proper names but not adjectives derived therefrom.
_La vie de Ronsard_; _Histoire de la litterature francaise_, _Novelle e racconti popolari italiani_, _Antologia de poetas liricos castellanos_.
d.