I can't get it to work at the KLM complaints link : https://klmf.ly/3fQvx2R

You add it but it doesn't work. As expected.

Helaas nog maar één ster. Was prima maar sinds de laatste updates van Firefox worden de taalpaketten wel geïnstalleerd (ik gebruikte NL, GB, DE en Fr) maar kan ik ze niet meer oproepen...

A completely useless language pack, because after installing it doesn't do anything

heel moeilijk te hanteren. werkt voor mij totaal NIET

I have the add on installed and it does not do anything while I am writing in google mail. It even does not come into the language list, while it says it is installed. Very strange and difficult to count on.

It simply does not do anything...

This add-on does not work in Firefox 69.0 64-bit running on Microsoft Windows 10/version 1903, build 18362.356.

Does not work in Windows 10. After many years this is the reason for leaving Firefox and will use Chrome

Cannot choose dutch language for spell-check after installing the language pack. What does it do?

It doesn't work! At all!!

The language add on is installed but it does not work: Dutch language is not possible to switch to.

Trying to get the Dutch language pack added, but after 30 minutes of trying it has not activated

Does not work

Doesn't work. Everything still in English.

3th version in a row this isn't working. I hate to say this but I'm exit. Welcome Chrome.