After some time tampering with SLG System engine, I did create a tool to work with it's scripts. And not just simple string editor, no.
SLGScriptTool is dual languaged GUI tool for (de)compiling and (de/en)crypting (with key finding) scripts of SLG System engine. Supports all known versions of SLG System: 0, 1, 2, 3 (3.0, 3.1), 4 (4.0, 4.1), but may lack of support of some it's variations. With this tool you can: decompile and compile script of SLG System, (en/de)crypt script of any game on SLG System, find key of any game on SLG System via cryptoattack.
Link for the tool: https://github.com/TesterTesterov/SLGSystemScriptTool
Built release (for x64 and x32): https://github.com/TesterTesterov/SLGSystemScriptTool/releases/tag/v1.0
Why SLG System is so noteworthy? Legendary series Sengoku Hime and Sangoku Hime (PC version) does use this engine (well, Sengoku Hime 7 and probably Sangoku Hime 5 does use Unity, but pay it no mind).
Now with SLGSystemDataTool and some HEX-editing of supplement data files it is possible to translate whose game series.