All dictionaries, whether print or online, are listed in the Franklin Catalog. Use the subject heading keyword option and search the name of the language followed by the word dictionaries.
Example: russian language dictionaries
While ebooks do not receive call numbers, for print works, some language dictionary call number stems include:
Arabic PJ 6640
Chinese PL 1455
Dutch PF 640
English PE 1620
French PC 2640
Italian PC 1640
Japanese PL 679
German PF 3640
Greek PG 2640
Latin PA 2365
Russian PG 2640
Spanish PC 4640