You can use multiple languages in a design table. However, the language for the value in a table body cell must be in the same language as the parameter in the corresponding column header.
For example, if the parameter in the column header is in English, then the corresponding value in the table body cell must also be in English. The next column header can be in another language, such as Japanese, but its corresponding value in the table body cell must also be in Japanese.
If the design table has been saved in English and then opened in Japanese, only English and Japanese will work. You cannot add another language, such as Polish, unless you use a Polish version of SolidWorks, or you have previously opened, closed, or saved the design table in a Polish version of SolidWorks.
Design tables used in versions prior to SolidWorks 2003 do not support multiple languages.