Add translation.md for Weblate.org

Closes #29548

Signed-off-by: Alexander Schwartz <aschwart@redhat.com>
Signed-off-by: Jon Koops <jonkoops@gmail.com>
Signed-off-by: Robin Meese <39960884+robson90@users.noreply.github.com>
Co-authored-by: Robin Meese <39960884+robson90@users.noreply.github.com>
Co-authored-by: Jon Koops <jonkoops@gmail.com>
Co-authored-by: Alexander Schwartz <aschwart@redhat.com>

docs/translation.md

@@ -0,0 +1,52 @@
+# Translation Guidelines
+
+Thank you for your interest in contributing translations to Keycloak! 
+This document provides guidelines for contributing translations and getting started with Weblate.
+
+## Why Translation Matters
+
+Translation enables Keycloak to reach a wider audience by making the platform usable for speakers of various languages. By translating Keycloak, you help improve accessibility and usability for users who may not be proficient in English.
+
+## What to translate
+
+Your contributions can greatly enhance the user experience for non-English speakers.
+
+Keycloak welcomes translations of its user interfaces and error messages via Weblate. 
+
+There is also a [Keycloak Documentation translation project](https://github.com/openstandia/keycloak-documentation-i18n). 
+
+## Getting Started with Weblate
+
+Keycloak uses [Weblate](https://hosted.weblate.org/projects/keycloak/), a web-based translation platform, to manage translations of user interfaces and error messages.
+
+Here's how you can get started:
+
+- Sign Up: Visit Weblate to create an account.
+- Configuration: After signing up, configure your Weblate account settings according to your preferences. Please note that the committer email is set to the login email address by default. You can adjust this in your Weblate profile under Account settings.
+- Join the Keycloak translation team on Weblate to start contributing translations.
+
+### Guidelines and Conventions
+
+To ensure consistency and quality across translations, please adhere to the following guidelines:
+
+- Use formal or informal language as appropriate for the context.
+- Maintain consistency with existing translations.
+- Translate text accurately, ensuring that the meaning is preserved.
+- Weblate will pushe translations as a pull request to the [Keycloak repository](https://github.com/keycloak/keycloak) at least once a day. A maintainer for that language has the ability to approve or decline that translation.
+
+### Supported translations
+
+Keycloak already supports a lot of translations. 
+While were in the transitioning process towards Weblate, the following translations are available in Weblate:
+
+- German
+- Dutch
+
+For all other translations, look for the `messages_*.properties` files in the main repository and create a pull request with your translations. 
+
+Please note that while we aspire to support more translations in the future, our current focus is on these translations. We rely on volunteers like you to take the initiative in steering the translation efforts for additional translations. If you're interested in contributing translations for a language not listed above, add a comment to the [localization platform discussion](https://github.com/keycloak/keycloak/discussions/9270).
+
+If you have any questions or need assistance, feel free to reach out to the language maintainers listed below:
+
+* German: [Robin Meese](https://github.com/robson90)
+* Dutch: [Jon Koops](https://github.com/jonkoops)