Messages from programs are not appearing in the user's native language. What environment variable must be set for this to happen?

Question

Options

• ALANG
• BI18N
• CMESSAGES
• DMSGS
• ELC_MSGS

• A
  83% (35)
• B
  10% (4)
• C
  5% (2)
• E
  2% (1)

Explanation

LANG is the standard POSIX environment variable that controls the locale for a process, including the language used for program messages, date formats, number formats, and more. When set (e.g., LANG=fr_FR.UTF-8), programs that support internationalization (i18n) will display output in the specified language.

The distractors are wrong for these reasons:

• B (I18N) - not a real environment variable; "i18n" is just shorthand for "internationalization" as a concept
• C (MESSAGES) - not a standard environment variable; sounds plausible but doesn't exist in POSIX
• D (MSGS) - similarly fabricated; no such standard variable
• E (LC_MSGS) - close but incorrect; the real variable is LC_MESSAGES (plural, with an "E"), which overrides LANG specifically for message catalogs - but LANG is the foundational variable that must be set first and is what the question is testing

Memory tip: Think "LANG = Language" - it's the master locale switch. All LC_* variables (like LC_MESSAGES, LC_TIME, LC_NUMERIC) override specific aspects of LANG, but LANG is the one variable you must set to get translated messages at all.

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