International:

Ethnologue Information about 6,800 languages and 41,00 alternative dialects from around the world.     

French:

LeMonde (popular French journal on-line)

Yamada Web Guide to French   

German:

New English-German Dictionary   

Japanese:

Japanese Electronic Dictionary

Latin:

Armarium Labyrinthi (Latin Bookself) 

Latin Dictionary and Grammar Aid (Notre Dame)  

Perseus Project (Ancient World)  

Spanish:

Search Engines and Links for St. Mary's Spanish Students