Christopher Schröder Jul 3, 2020:

Church parts are a nightmare and unless you’re an architect you just see words and don’t know what they are, so depending on your context and readership it may not be worth worrying about being too specific. Just saying.

Leif Ohman Jul 3, 2020:

@Deane Thanks. Having verified that Sw. "pulpet" (in a church) is a "lectern" rather than a "pulpit" I am now ready to agree with your answer. (The member of the congregation who gets up to read a passage from the Bible will walk to a lectern to do so rather than joining the pastor in the pulpit.)

Deane Goltermann Jul 2, 2020:

@Leif Looks like good work!

Leif Ohman Jul 2, 2020:

...a real name for the part of the church... I would start with the precise definition of the term in Swedish.

For "läktare" that seems to be:

"pulpet för bibelläsningen i en kyrka; upphöjt galleri",
"i fråga om äldre kyrkor äv. liktydigt med: empor",
"empor... (brett) galleri som utgör övervåning av ett sidoskepp i en kyrka med bågar som öppnar sig inåt mittskeppet el. det centrala mittpartiet"

Source: https://svenska.se/tre/?sok

There is also support for "orgelläktare".

For "bröstning" you will find it is from German "Brüstung".
Since Duden defines it the same way as the Swedish term, you can translate the German term instead:
For "Brüstung", I find both "parapet" and "balustrade" at: https://www.dict.cc/

So it seems all the answers given are at least partly right.