Use localization tag for issues related to formatting and storage of data affected by locale (language and country), such as language character sets, decimal number separators, and date formatting.
Use the localization for issues such as character set of the database, localization based on the server location and client location, etc.
Example: The number 1776.3 could be displayed differently in the United States and Italy:
Country Results
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United States 1,776.3
Italy 1.776,3