How do global teams handle internal terminology across languages?

While building Shavely (a multilingual chat app), we discovered a problem:

Machine translation often fails with internal terminology.

Example: Hotel housekeeping term "Stay Full"

• Normal translation → nonsense

• Actual meaning → full cleaning while guest stays

So we added a custom dictionary feature where teams define translations.

Curious: How do your teams handle internal terms across languages?

• Slack?

• Glossaries?

• Manual explanations?