diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -21,3 +21,7 @@
 ## 0.5.0.0 -- 2021-09-04
 
 * Fifth version. Added new functions that can be used in the phonetic languages approach.
+
+## 0.5.1.0 -- 2021-09-04
+
+* Fifth version revised A. Fixed issue with some not common patterns in the phonetic languages approach.
diff --git a/Interpreter/StringConversion.hs b/Interpreter/StringConversion.hs
--- a/Interpreter/StringConversion.hs
+++ b/Interpreter/StringConversion.hs
@@ -14,7 +14,7 @@
 
 import Text.Read (readMaybe)
 import Data.Maybe (fromJust,fromMaybe)
-import Data.Char (isDigit,isAlpha)
+import Data.Char (isDigit)
 import Data.List (sort,nub,(\\))
 import Data.Monoid (mappend)
 import Control.Exception
@@ -62,22 +62,18 @@
 
 -------------------------------------------------------------
 
-{-| If 'True' then it might be the one word in the phonetic languages approach. If 'False', it is usually not.
--}
-mightBePLWord :: String -> Bool
-mightBePLWord xs
- | null (dropWhile (not . isAlpha) us) = not (null ts)
- | otherwise = False
-     where (ts,us) = span isAlpha xs
-{-# INLINE mightBePLWord #-}
-
 argsConvertTextual :: String -> [String] -> [String]
 argsConvertTextual ts tss
  | any (== ts) tss = tss
  | otherwise = tss `mappend` [ts]
 {-# INLINE argsConvertTextual #-}
 
-fullArgsConvertTextual :: String -> String -> [String] -> [String]
-fullArgsConvertTextual textProcessment0 lineA args =
-  argsConvertTextual textProcessment0 (takeWhile (not . mightBePLWord) args `mappend` words lineA)
+fullArgsConvertTextual
+  :: (String -> Bool) -- ^ The predicate that checks whether the given argument is not a phonetic language word in the representation.
+  -> String
+  -> String
+  -> [String]
+  -> [String]
+fullArgsConvertTextual p textProcessment0 lineA args =
+  argsConvertTextual textProcessment0 (takeWhile p args `mappend` words lineA)
 {-# INLINE fullArgsConvertTextual #-}
diff --git a/string-interpreter.cabal b/string-interpreter.cabal
--- a/string-interpreter.cabal
+++ b/string-interpreter.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                string-interpreter
-version:             0.5.0.0
+version:             0.5.1.0
 synopsis:            Is used in the phonetic languages approach (e. g. in the recursive mode).
 description:         A library that has commonly used functions for the phonetic-languages implementations that deals with String data.
 homepage:            https://hackage.haskell.org/package/string-interpreter