Describes the cause and action for error messages.
Error Message(English)：
special characters not allowed in excel
How to only allow alphanumeric characters entry in Excel?
https://www.extendoffice.com/documents/excel/3408-excel-only-allow-alphanumeric.html
Are there special characters that are not allowed in an Excel sheet I ...
https://help.poolparty.biz/faq/faq-s/excel-import-export/are-there-special-characters-that-are-not-a・・・
Seven Characters You Can't Use in Worksheet Names | AccountingWEB
https://www.accountingweb.com/technology/excel/seven-characters-you-cant-use-in-worksheet-names
How to Insert Symbols and Special Characters in Excel (Quick and Easy)
https://spreadsheeto.com/symbols-and-characters/
What Are the Rules for Excel Names? ? Contextures Blog
https://contexturesblog.com/archives/2017/12/07/what-are-the-rules-for-excel-names/
Special Characters Allowed in Excel Formulas and ... - exceltoxl.com
http://www.exceltoxl.com/index.php?p=68&more=1&c=1&tb=1&pb=1
worksheet function - Is there an Excel formula to identify special ...
https://superuser.com/questions/660692/is-there-an-excel-formula-to-identify-special-characters-in-a・・・
Excel - Allow only Text or only Numbers Entered into a Cell in Excel ...
https://www.youtube.com/watch?v=7mrc6cEY8oA
https://www.youtube.com/watch?v=7mrc6cEY8oA