As you can see here, the translation for the Mangrove Log/Planks, Rooted Dirt and probably more items and blocks are missing when switching the language to Português (Brasil). So far, I've encountered this bug in Android Bedrock and Windows.
MCPE-201847
Missing translations of some blocks/items in PT-BR
Resolved
Duplicate
0
(Unassigned)
Unconfirmed
Multiple
Android 10, Window UWP build Win 10.0.19045.5679
1.21.80.25 Preview
Retrieved
This issue is being tracked at MCPE-194358.