A source key is a segment of text stored in Localazy, representing content in your source language. It’s a single string of text in your source language, e.g., a button label or a short paragraph of text in a dialogue window of your application. It can even be a short blog article written in Markdown syntax. In the picture below, there are three source keys; as you can see, each contains a different type of content.
Translations to other languages are unlimited, and translating your project to more languages does not affect the number of source keys used. I.e., the content of one source key translated into 10 languages still counts as one source key.