Created attachment 154205 [details]
Portuguese (Brazil, Nativo for US keyboards) keyboard layout screenshot.

The "Portuguese (Brazil, Nativo for US keyboards)"keyboard layout key placement doesn't look at all like a regular US keyboard (ANSI-INCITS 154-1988) (see attachment for the keyboard preview). 

Also, I was expecting is a similar behaviour to the English (US, into., with dead keys), with a few following key differences mostly relating to how dead keys and diacritics are handled:

* Acute followed by c produces ç
    * Typing ' followed by any other consonant should not compose: '+s should not generate ś.
* Acute followed by a vowel produces that vowel with an acute:
    * '+a=á, '+e=é, etc
* Agrave ` followed by "a" produces à (a+agrave)
    * All the other vowels should not compose: typing `+o should produce "`o" and not "ò", as that does not exist in the Portuguese language.
* Typing " (double quote) followed by u produces ü (u+two overdots)
    * Typing " followed by any other letter (including vowels) should not compose: "+a should not generate ä.
* Tilde should only compose with the vowels "a" and "o"
* Circumflex should only compose with the vowels "a", "e", and "o"

I'd be glad to fix this if someone was willing to provide some links to how keyboard layouts are handled in KDE.

Iǘe tried to submit this bug under the 'libkde' component, but I couldn't find it in the list.