First image:

In red: The date shown in the event details on the calendar, in Brazilian Portuguese (pt-BR), repeats the day of the week twice. In the example, it should be written as: 9 de agosto de 2025 | sábado. The day and month should be lowercase.

In blue: In this case, only the first letter should be capitalized, with the rest in lowercase.

Second image:

These sentences are also not available in Crowdin. I’m also not sure if it's possible to fix this by only following the instructions at https://learn.microsoft.com/en-us/dotnet/standard/base-types/custom-date-and-time-format-strings.