Here are top 13 most popular translation plugins for wordpress websites.
Polylang
wordpress.org
Weglot
wordpress.org
GTranslate
wordpress.org
Google Language Translator
wordpress.org
Loco Translate
wordpress.org
TranslatePress
wordpress.org
WPML
wpml.org
Google Website Translator
wordpress.org
xili-language
wordpress.org
Lingotek Translation
wordpress.org
Multilanguage
wordpress.org
MultilingualPress
wordpress.org
Goo Translate Widget
wordpress.org