Select Regional and Language Options , then click the Languages tab.
For certain languages (like East Asian or complex script languages), check the boxes under "Supplemental language support" to install necessary files.
Since official Microsoft links are largely inactive, the is the primary source for these legacy files:
Go to Start > Control Panel > Date, Time, Language, and Regional Options .
Windows XP reached its end of support on April 8, 2014, meaning Microsoft no longer provides direct downloads or official support for these language packs. To obtain them now, you must rely on community archives or third-party repositories.