While everybody can browse projects, view translations or suggest them, only registered users are allowed to actually save changes and are credited for every translation made.
You can register following two simple steps:
User profile contains your preferences, name and email. Name and email are being used in Git commits, so keep this information accurate.
Choose here which languages you prefer to translate. These will be offered to you on main page to have easier access to translations.
You can define secondary languages, which will be shown you while translating together with source language. Example can be seen on following image, where Czech language is shown as secondary:
You can subscribe to various notifications on Subscriptions tab. You will receive notifications for selected events on chosen projects for languages you have indicated for translation (see above).
On the Authentication tab you can connect various services which you can use to login into Weblate. List of services depends on Weblate configuration, but can include popular sites such as Google, Facebook, GitHub or Bitbucket.