file extension

English

file extension (plural file extensions)

A short series of text characters at the end of a computer filename, used to indicate the type of contents and the software that will be required to operate or open it.
A text file may have a file extension of .txt.

string of characters

Chinese:
Cantonese: 副檔名, 副档名 (fu³ dong² ming⁴)
Mandarin: 擴展名, 扩展名 (kuòzhǎnmíng) (mainland China), 文件擴展名, 文件扩展名 (wénjiàn kuòzhǎnmíng) (mainland China), 副檔名, 副档名 (fùdǎngmíng, fùdàngmíng) (Taiwan), 延伸檔名, 延伸档名 (yánshēn dǎngmíng, yánshēn dàngmíng) (Taiwan), 後綴名, 后缀名 (hòuzhuìmíng) (mainland China)
Czech: koncovka souboru f, přípona souboru f
Danish: filtype, filendelse c
Dutch: bestandsextensie
Finnish: tiedostopääte
French: extension de fichier
German: Dateiendung
Hungarian: fájlkiterjesztés

Italian: estensione di nome di schedario
Japanese: 拡張子 (かくちょうし kakuchōshi)
Norwegian:
Bokmål: filetternavn n, filendelse m, filnavnsuffiks n
Nynorsk: filetternavn n, filending f, filnavnsuffiks n
Polish: rozszerzenie (pl)
Portuguese: extensão (pt) f
Russian: дополне́ние к файлу (dopolnénije k fajlu)
Spanish: extensión de archivo
Swedish: filändelse c, filsuffix n