Table:
0
A
B
C
D
E
F
1
Gothic letter or digraph
Roman equivalent
"Normalised" transliteration
Sound
Normal environment of occurrence (in native words)
Proto-Germanic origin
2
��
a
a
/a/
Everywhere
/a/
3
��
a
ā
/aː/
Before /h/, /hʷ/
/ãː/ (before /h/)
4
����
ai
aí
/ɛ/
Before /h/, /hʷ/ , /r/
/e/, /i/
5
����
ai
ai
/ɛː/
Before vowels
/eː/
6
����
ai
ái
/ɛː/
Not before vowels
/ai/
7
����
au
aú
/ɔ/
Before /h/, /hʷ/ , /r/
/u/
8
����
au
au
/ɔː/
Before vowels
/oː/
9
����
au
áu
/ɔː/
Not before vowels
/au/
10
��
e
ē
/eː/
Not before vowels
/eː/
11
����
ei
ei
/iː/
Everywhere
/iː/ ; /ĩː/ (before /h/)
12
��
i
i
/i/
Everywhere except before /h/, /hʷ/ , /r/
/e/, /i/
13
����
iu
iu
/iu/
Not before vowels
/eu/, /iu/
14
��
o
ō
/oː/
Not before vowels
/oː/
15
��
u
u
/u/
Everywhere except before /h/, /hʷ/ , /r/
/u/
16
��
u
ū
/uː/
Everywhere
/uː/ ; /ũː/ (before /h/)

Questions and formulas:
Question: What is the Roman translation with "Normalised" transliteration i
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="i"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F16,C2:C16="i"),2))
Level: medium
Question: what is the "normalized" transliteration for Roman i
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="i"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F16,B2:B16="i"),3))
Level: medium
Question: what is the normal environment of occurrence that has a Proto-Germanic origin /ai/
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,F1="/ai/"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F16,F2:F16="/ai/"),5))
Level: medium