Hi @matheuslimx,
Welcome! Which version of Kibana are you using? Looking at the latest version documentation Portuguese is not one of the supported locales.
However, from the below threads it looks like building a plugin could work:
- Translating Kibana to pt-BR - #4 by azasypkin
- Kibana - Is the translation to pt-BR still working the same since 2019?
You could try to search and see if anyone exposed a plugin for Portuguese after these posts were published. Alternatively it should give you a start in creating your own.
Hope that helps!