Getting the banner fix to work was quite a hassle for me, so I decided to write a little tut in case some other people have problems with this as well:
1.
DO NOT put the translation files (00040000001BE100 folder) into Luma->titles !
2. Download the latest version of HackingToolkit9DS
(it has to be version 12, rebuilding the .cia file doesn't work properly with lower versions)
3. Put the Pictlogica .cia file into the PackHack folder
->Install SetupUS
->open HackingToolkit9DS and follow the instructions to extract the .cia file (there should be some new files and folders in the PackHack folder now)
4. Download and unpack the two files (banner fix and the patch) from the OP
->replace the ExtractedBanner folder in PackHack with the ExtractedBanner folder you've just
downloaded
->open the romfs folder inside the 00040000001BE100 folder and move all the files to
PackHack>ExtractedRomFS (replace all the files)
5. Download ucrtbased.dll and vcruntime140d.dll from dll-files (
make sure to download the correct version
for your operating system (either the 32 or the 64 bit version), otherwise you'll get an error when you try
to rebuild the .cia file!) and place these two files in the PackHack folder
->open HackingToolkit9DS and follow the instructions to rebuild the .cia file
6. Copy this .cia file to your SDcard and install the game using FBI
The game should now work as intended!

Oh, and of course thanks to the people who worked on this translation!!