assert_equal [EN], Locale.list("en")
assert_equal [EN, ZH_YUE, ZH_HANT_TW], Locale.list("en", "zh-yue", "zh-Hant-TW")
assert_equal [ZH_YUE, ZH_HANT_TW], Locale.list("en;de", "zh-yue", "zh-Hant-TW")
assert_equal [EN], Locale.list("en")
assert_equal [EN, ZH_YUE, ZH_HANT_TW], Locale.list("en", "zh-yue", "zh-Hant-TW")
assert_equal [ZH_YUE, ZH_HANT_TW], Locale.list("en;de", "zh-yue", "zh-Hant-TW")