Squashed commit of the following:

commit b853385ea9b9409a29a30c7af4d47c9a500cd287
Author: Vladimir Iakovlev <nvbn.rm@gmail.com>
Date:   Tue Jan 15 00:54:01 2019 +0100

    #864: Make the solution for Greek a bit more extensible

commit 073ebceb594ad24972f7765b1f608de44c1cebf2
Merge: b946b7d 141462a
Author: Vladimir Iakovlev <nvbn.rm@gmail.com>
Date:   Tue Jan 15 00:46:09 2019 +0100

    Merge branch 'master' of git://github.com/RealOgre/thefuck into RealOgre-master

commit 141462a
Author: RealOrge <45096491+RealOrge@users.noreply.github.com>
Date:   Thu Dec 13 16:47:43 2018 +0200

    Update switch_lang.py

commit 1f79285
Author: RealOrge <45096491+RealOrge@users.noreply.github.com>
Date:   Thu Dec 13 16:39:04 2018 +0200

    Update switch_lang.py

commit e7dede5
Author: RealOrge <45096491+RealOrge@users.noreply.github.com>
Date:   Thu Dec 13 15:24:10 2018 +0200

    Update switch_lang.py

commit 4a0a973
Author: RealOrge <45096491+RealOrge@users.noreply.github.com>
Date:   Thu Dec 13 15:04:44 2018 +0200

    Update switch_lang.py

commit 80d6b8d
Author: RealOrge <45096491+RealOrge@users.noreply.github.com>
Date:   Thu Dec 13 14:25:15 2018 +0200

    Update switch_lang.py

commit 66b13c5
Author: RealOrge <45096491+RealOrge@users.noreply.github.com>
Date:   Thu Dec 13 11:44:48 2018 +0200

    Update switch_lang.py

thefuck/rules/switch_lang.py

@@ -2,22 +2,42 @@
 from thefuck.utils import memoize, get_alias
 
 target_layout = '''qwertyuiop[]asdfghjkl;'zxcvbnm,./QWERTYUIOP{}ASDFGHJKL:"ZXCVBNM<>?'''
+# any new keyboard layout must be appended
+
+greek = u''';ςερτυθιοπ[]ασδφγηξκλ΄ζχψωβνμ,./:΅ΕΡΤΥΘΙΟΠ{}ΑΣΔΦΓΗΞΚΛ¨"ΖΧΨΩΒΝΜ<>?'''
 
 source_layouts = [u'''йцукенгшщзхъфывапролджэячсмитьбю.ЙЦУКЕНГШЩЗХЪФЫВАПРОЛДЖЭЯЧСМИТЬБЮ,''',
                   u'''йцукенгшщзхїфівапролджєячсмитьбю.ЙЦУКЕНГШЩЗХЇФІВАПРОЛДЖЄЯЧСМИТЬБЮ,''',
                   u'''ضصثقفغعهخحجچشسیبلاتنمکگظطزرذدپو./ًٌٍَُِّْ][}{ؤئيإأآة»«:؛كٓژٰ‌ٔء><؟''',
-                  u''';ςερτυθιοπ[]ασδφγηξκλ΄ζχψωβνμ,./:΅ΕΡΤΥΘΙΟΠ{}ΑΣΔΦΓΗΞΚΛ¨"ΖΧΨΩΒΝΜ<>?''',
-                  u'''/'קראטוןםפ][שדגכעיחלךף,זסבהנמצתץ.QWERTYUIOP{}ASDFGHJKL:"ZXCVBNM<>?''']
+                  u'''/'קראטוןםפ][שדגכעיחלךף,זסבהנמצתץ.QWERTYUIOP{}ASDFGHJKL:"ZXCVBNM<>?''',
+                  greek]
+
+
+source_to_target = {
+    greek: {u';': "q", u'ς': "w", u'ε': "e", u'ρ': "r", u'τ': "t", u'υ': "y",
+            u'θ': "u", u'ι': "i", u'ο': "o", u'π': "p", u'[': "[", u']': "]",
+            u'α': "a", u'σ': "s", u'δ': "d", u'φ': "f", u'γ': "g", u'η': "h",
+            u'ξ': "j", u'κ': "k", u'λ': "l", u'΄': "'", u'ζ': "z", u'χ': "x",
+            u'ψ': "c", u'ω': "v", u'β': "b", u'ν': "n", u'μ': "m", u',': ",",
+            u'.': ".", u'/': "/", u':': "Q", u'΅': "W", u'Ε': "E", u'Ρ': "R",
+            u'Τ': "T", u'Υ': "Y", u'Θ': "U", u'Ι': "I", u'Ο': "O", u'Π': "P",
+            u'{': "{", u'}': "}", u'Α': "A", u'Σ': "S", u'Δ': "D", u'Φ': "F",
+            u'Γ': "G", u'Η': "H", u'Ξ': "J", u'Κ': "K", u'Λ': "L", u'¨': ":",
+            u'"': '"', u'Ζ': "Z", u'Χ': "X", u'Ψ': "C", u'Ω': "V", u'Β': "B",
+            u'Ν': "N", u'Μ': "M", u'<': "<", u'>': ">", u'?': "?", u'ά': "a",
+            u'έ': "e", u'ύ': "y", u'ί': "i", u'ό': "o", u'ή': 'h', u'ώ': u"v",
+            u'Ά': "A", u'Έ': "E", u'Ύ': "Y", u'Ί': "I", u'Ό': "O", u'Ή': "H",
+            u'Ώ': "V"},
+}
 
 
 @memoize
 def _get_matched_layout(command):
     # don't use command.split_script here because a layout mismatch will likely
-    # result in a non-splitable sript as per shlex
+    # result in a non-splitable script as per shlex
     cmd = command.script.split(' ')
     for source_layout in source_layouts:
         is_all_match = True
-
         for cmd_part in cmd:
             if not all([ch in source_layout or ch in '-_' for ch in cmd_part]):
                 is_all_match = False
@@ -35,12 +55,18 @@ def _switch(ch, layout):
 
 
 def _switch_command(command, layout):
+    # Layouts with different amount of characters than English
+    if layout in source_to_target:
+        return ''.join(source_to_target[layout].get(ch, ch)
+                       for ch in command.script)
+
     return ''.join(_switch(ch, layout) for ch in command.script)
 
 
 def match(command):
     if 'not found' not in command.output:
         return False
+
     matched_layout = _get_matched_layout(command)
     return (matched_layout and
             _switch_command(command, matched_layout) != get_alias())