Thank you for reporting the issue, the following commits should mend the if/then combination. 

https://pagure.io/setroubleshoot/c/99c85e991195fd5f5927e65643c8e02d3530c8a7?branch=stable
https://pagure.io/setroubleshoot/c/bb580a01fda8971f516252fdda39c0a5b7398582?branch=stable
https://pagure.io/setroubleshoot/c/21b18ac511ad8ed25d967b0face1d56590894af7?branch=stable

As for the "simple words", could you please be more specific? If you could provide the strings in question (preferably in English), we should be able to pinpoint their occurrence in the interface.

  I do not remember all details, but just running sealert -b on a rhel7
using pt_BR I see at first:

Window title needs a space:

SELinux Alert Browser -> Navegador de Alertasdo SELinux
words concatenated, should be "Alertas do"

The source process: -> O processo de origem:
would be better as just "Processo de origem:"

On this directory: -> Em directory:
would be better "No diretório:"

  I am uncertain about some complex phrases, if it is translation
error or bad due to lack of context. A simple one:

If you believe that bash should be allowed write access on the null file by default.
Se você acredita que o bash deva ser permitido acesso de write em null file por default.

The correct sentence would be:
"Se você acredita que o bash deva ter acesso de escrita no arquivo null por padrão."

But this is not a end user tool, so, the above commits already did great.

I believe the issue is context, for example, checking
https://pagure.io/setroubleshoot/blob/master/f/framework/po/pt_BR.po I
would say like 95% or more is good, there are a few clear errors (like
not translating in computing sense). Most issues looks like related to
composing text and/or in some cases $VARS not translated. If these
$VARS are not multiple words, it should be ok, otherwise, not only
in Portuguese adverb goes after adjective, and things start to get
confusing.

Re. Comment 5:
Several issues are covered by this bug, most of which should be resolved by the patches.
 
1) A missing space in the window title is obviously a code issue and should be fixed by the patches.

2) Complete strings that were incorrectly translated such as "The source process" have to be fixed by Portugese speakers in https://fedora.zanata.org/iteration/view/setroubleshoot/stable
In this case the translation is fixed. But if you find any more, please try to correct them directly in zanata.

3) Parametric strings such as "On this %object_class" (e.g. "On this directory") are difficult to deal with correctly. We understand that in some languages it's impossible to translate them so that every combination is grammatically correct. However expanding such strings would unreasonably bloat the code and make translating way more time consuming.

4) Plugin "If" statements such as "If you believe that bash should be allowed write access on the null file by default.". The "If" part of the string used to be separate from the rest of the sentence which is fixed now.

Furthermore we have increased the amount of translatable text (e.g. tooltips, all buttons and window titles are now translatable) which should improve user experience. Obviously not all strings are translated which is something we need native speakers for. (Anyone can contribute to the translations on https://fedora.zanata.org/iteration/view/setroubleshoot)

Re. Comment 8: 
Thank you for verifying the fixes.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0994