@Sakke The dictfmt format is new to me and Lingae, Penelope nor PyGlossary are able to do much with it. Try getting the dictionary in another format and I'll give it another go.
Code:
00-database-dictfmt-1.12.1
Svenska-suomi FreeDict+WikDict dictionary
Maintainer: Karl Bartel
Edition: 2020.02.08
Size: 12080 headwords
Publisher: Karl Bartel.
Availability:
Licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported
license
Publication date: 2020-02-08.
Notes:
* Database Status: big enough to be useful
Source(s):
Automatic creation of this bilingual dictionary by WikDict
[http://www.wikdict.com/]. Base data from Wiktionary.org
[https://www.wiktionary.org/] via , DBnary
[http://kaiko.getalp.org/about-dbnary/].
The Project:
This dictionary comes to you through nice people making it available for
free and for good. It is part of the FreeDict project,
http://www.freedict.org/. This project aims to make available many
translating dictionaries for free. Your contributions are welcome!
Changelog:
* 2018-09-12 Karl Bartel:
Change numbering scheme from YYYY-MM-DD to YYYY.MM.DD
* 2018-05-15 Karl Bartel:
Add links to sourceDesc
* 2017-12-15 Karl Bartel:
Add changelog
* 2017-11-22 Karl Bartel:
Use ref tag to encode license URL
Svenska-suomi FreeDict+WikDict dictionary ver. 2020.02.08
http://www.wikdict.com/
-are /ˈarə/ <affix>
1. -mpi, -mmin
adjektiv- och adverbkomparator
2. -lainen, -läinen
invånare
3. -ja, -jä
person som utför något
-bar /bˈɑːr/ <affix>
-tava, -kelpoinen
möjlig att utsätta för verbhandlingen
-gon /ɡˈɔn/ <affix>