Why does Google Assistant not understand my commands?

Depending on Google Assistant's maturity in your local language, you may experience some difficulties with Google Assistant's language understanding. To limit these misunderstandings, you should name your products and rooms, and make sure to include these names in your commands.

Alternatively, you can go to "Settings" in your Google Home app and add a secondary language (preferably English, French or German), which will allow you to use commands in both your local language as well as a language in which the Google Assistant has higher proficiency.