Inserting zero-width space after each symbol

I need to place a zero-width space after each character within the texts in MS Excel document.
Two important conditions:

• The target text is in Japanese and Chinese.
• Text with Latin characters and numbers should not be affected. I.e. in mixed Asian\Latin cell only Asian characters have to be separated by those spaces.

Amount of texts is huge so it's a pain to put them in manually.

I tried to find any suitable VBA-module out, but with no success.

Maybe it's possible to perform such action in another application and then import the texts back to Excel? That's solution is also acceptable.

Thanks in advance.

P.S. Exceptions (Latin characters):

65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122

Assuming:

U+200B

This little macro:

Sub dural()
    Dim zws As String, A1 As String, L As Long, i As Long
    Dim temp As String

    zws = ChrW(8203)
    A1 = Range("A1").Text

    L = Len(A1)
    For i = 1 To L
        temp = temp & Mid(A1, i, 1) & zws
    Next i

    temp = Mid(temp, 1, Len(temp) - 1)
    MsgBox A1 & vbCrLf & temp

    Range("A2").Value = temp
End Sub

will produce:

NOTE:

The character may be zero-width, but not zero-length!