With Enagramm Spellchecker you can check spelling for 32 Languages.
With Enagramm Spellchecker extension you can check spelling for Abkhazian, Adyghe, Albanian, Armenian, Azerbaijani, Belarusian, Bosnian, Bulgarian, Croatian, Czech, Estonian, Georgian, Greek, Kazakh, Kyrgyz, Latvian, Lithuanian, Macedonian, Ossetian, Polish, Romanian, Russian, Serbian, Slovak, Slovenian, Tatar, Tajik, Turkmen, Turkish, Ukrainian, Uzbek Languages. It also features a personal dictionary for words that you might commonly use but that are not found in a conventional dictionary.
In order to use add-in, you should be registered at https://enagramm.com/
The monthly subscription fee for the service is USD 2, which includes MS Word Add-in too. After registration, you will have 2 weeks trial period to find out if you like our product.