You can do that by using the validation feature by adding a regular expression, checking that the input is in a certain language code range.
For example if you want to make sure the language is in Cyrillic, you can use:
[\u0400-\u04FF\u0500-\u052F]
Below is a list of language code ranges for each languages. You can also go to this link for more references.
0000-007F Basic Latin
0080-00FF Latin-1 Supplement
0100-017F Latin Extended-A
0180-024F Latin Extended-B
0250-02AF IPA Extensions
02B0-02FF Spacing Modifier Letters
0300-036F Combining Diacritical Marks
0370-03FF Greek and Coptic
0400-04FF Cyrillic
0500-052F Cyrillic Supplement
0530-058F Armenian
0590-05FF Hebrew
0600-06FF Arabic
0700-074F Syriac
0750-077F Arabic Supplement
0780-07BF Thaana
07C0-07FF NKo
0900-097F Devanagari
0980-09FF Bengali
0A00-0A7F Gurmukhi
0A80-0AFF Gujarati
0B00-0B7F Oriya
0B80-0BFF Tamil
0C00-0C7F Telugu
0C80-0CFF Kannada
0D00-0D7F Malayalam
0D80-0DFF Sinhala
0E00-0E7F Thai
0E80-0EFF Lao
0F00-0FFF Tibetan
1000-109F Myanmar
10A0-10FF Georgian
1100-11FF Hangul Jamo
1200-137F Ethiopic
1380-139F Ethiopic Supplement
13A0-13FF Cherokee
1400-167F Unified Canadian Aboriginal Syllabics
1680-169F Ogham
16A0-16FF Runic
1700-171F Tagalog
1720-173F Hanunoo
1740-175F Buhid
1760-177F Tagbanwa
1780-17FF Khmer
1800-18AF Mongolian
1900-194F Limbu
1950-197F Tai Le
1980-19DF New Tai Lue
19E0-19FF Khmer Symbols
1A00-1A1F Buginese
1B00-1B7F Balinese
1D00-1D7F Phonetic Extensions
1D80-1DBF Phonetic Extensions Supplement
1DC0-1DFF Combining Diacritical Marks Supplement
1E00-1EFF Latin Extended Additional
1F00-1FFF Greek Extended
2000-206F General Punctuation
2070-209F Superscripts and Subscripts
20A0-20CF Currency Symbols
20D0-20FF Combining Diacritical Marks for Symbols
2100-214F Letterlike Symbols
2150-218F Number Forms
2190-21FF Arrows
2200-22FF Mathematical Operators
2300-23FF Miscellaneous Technical
2400-243F Control Pictures
2440-245F Optical Character Recognition
2460-24FF Enclosed Alphanumerics
2500-257F Box Drawing
2580-259F Block Elements
25A0-25FF Geometric Shapes
2600-26FF Miscellaneous Symbols
2700-27BF Dingbats
27C0-27EF Miscellaneous Mathematical Symbols-A
27F0-27FF Supplemental Arrows-A
2800-28FF Braille Patterns
2900-297F Supplemental Arrows-B
2980-29FF Miscellaneous Mathematical Symbols-B
2A00-2AFF Supplemental Mathematical Operators
2B00-2BFF Miscellaneous Symbols and Arrows
2C00-2C5F Glagolitic
2C60-2C7F Latin Extended-C
2C80-2CFF Coptic
2D00-2D2F Georgian Supplement
2D30-2D7F Tifinagh
2D80-2DDF Ethiopic Extended
2E00-2E7F Supplemental Punctuation
2E80-2EFF CJK Radicals Supplement
2F00-2FDF Kangxi Radicals
2FF0-2FFF Ideographic Description Characters
3000-303F CJK Symbols and Punctuation
3040-309F Hiragana
30A0-30FF Katakana
3100-312F Bopomofo
3130-318F Hangul Compatibility Jamo
3190-319F Kanbun
31A0-31BF Bopomofo Extended
31C0-31EF CJK Strokes
31F0-31FF Katakana Phonetic Extensions
3200-32FF Enclosed CJK Letters and Months
3300-33FF CJK Compatibility
3400-4DBF CJK Unified Ideographs Extension A
4DC0-4DFF Yijing Hexagram Symbols
4E00-9FFF CJK Unified Ideographs
A000-A48F Yi Syllables
A490-A4CF Yi Radicals
A700-A71F Modifier Tone Letters
A720-A7FF Latin Extended-D
A800-A82F Syloti Nagri
A840-A87F Phags-pa
AC00-D7AF Hangul Syllables
D800-DB7F High Surrogates
DB80-DBFF High Private Use Surrogates
DC00-DFFF Low Surrogates
E000-F8FF Private Use Area
F900-FAFF CJK Compatibility Ideographs
FB00-FB4F Alphabetic Presentation Forms
FB50-FDFF Arabic Presentation Forms-A
FE00-FE0F Variation Selectors
FE10-FE1F Vertical Forms
FE20-FE2F Combining Half Marks
FE30-FE4F CJK Compatibility Forms
FE50-FE6F Small Form Variants
FE70-FEFF Arabic Presentation Forms-B
FF00-FFEF Halfwidth and Fullwidth Forms
FFF0-FFFF Specials