"En" as "ein"

[Emma May Smith]

The theory joins together two things, which I feel need explaining:

• That the four first numbers are so similar in sound and shape. Literally only two vowels and two consonants. So you would need to propose a constructed language for this to be true.
  
• The second part of the hypothesis relies on statistics form Germanic languages.
  

How can these be squared? The text is written in Germanic, but not the numbers (except one)?

(As for numeral systems, if the text isn't writing out numbers in full, nor using specific numerals, then the writing system probably assigned values to each glyphs and used them in an additive system. This alphabetic numeral system was really common.)