A glossary is a bilingual file containing the translation of terms (word or phrase belonging to a particular domain or kind of language) in a special subject, field or area of usage.
You can import a glossary from the Translation Memory and Glossary tab in the Settings panel.
Once you access the Translation Memory and Glossary tab, click on the down arrow next to the Import TMX button corresponding to the private TM key where you want to import your glossary.
To import your glossary, select the option Import Glossary.
The glossary should be an XLSX file consisting of three columns:
The first line of the file should specify the languages of the glossary, using the following language codes: https://www.matecat.com/api/docs#languages
Here’s an example of a well formatted glossary:
Note that line 2 does not have a comment, while line 3 has: the Comment column is optional.