| | | | | | Old British Sign Language?
(c. 1760–1900) | | | |
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| | | | | | Swedish Sign Language
(c. 1800–present) | |
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| | | Portuguese Sign Language
(c. 1820–present) | | Finnish Sign Language
(c. 1850–present) | | | | |
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| | | Cape Verdian Sign Language
(c. 20th century–present) | | Finland-Swedish Sign Language
(c. 1850–present) | | Eritrean Sign Language
(c. 1950–present) |
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São Tomé and Príncipe Sign Language?
(c. 21st century–present) | | | | | | |
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