i already tried this plugin but it is displayed incorrectly for me and I have found nothing on the internet on how to fix this error. I have attached an image file.
Just in case it is still relevant:
Looks like you missed installing the "data" folder, which contains the translations for these strings.
I would recommend just running the installer, but if you want to manually install it you have to copy "SceneSwitcher\Windows\data" folder from the downloaded "SceneSwitcher.zip" archive to your OBS Studio installation directory, which is usually located at "C:\Program Files (x86)\obs-studio\".
├───data
│ ├───obs-plugins
│ │ ├───advanced-scene-switcher
│ │ │ └───locale <- translations are in here :)
...