May 27 2021
Documents in Japanese are not found in a SharePoint online site associated with a team search.
The cause seems to be a problem with the language setting on SharePoint.
As a test tried the following steps.
-Configure the search schema so that the search index is created in the correct language.
-A simple procedure to set the language for each library file (manually).
-A semi-automatic procedure (PowerShell) to set the language for each file in the library without changing the file's modification date and the person who modified it.
We did a search on the Document library that he has access to.
We were able to determine that the cause is that the corresponding document is recognized as English when searching in SharePoint.
Please let me know what settings should be set for SharePoint as a whole and how to deal with this.