Table:
0
A
B
C
D
E
1
"Long" vowels
17th c.
American
British
Australian
2
a /eɪ/
aː
ei
eɪ
æɪ
3
ar /ɛər/
aː
e
ɛː
eː
4
e /iː/
eː
i
i
i
5
æ /iː/
eː
i
i
i
6
œ /iː/
eː
i
i
i
7
ei /iː/
eː
i
i
i
8
er or ær /ɪər/
eː
i
ɪə
ɪə
9
er or ær /ɪər/
eː
ɪ
ɪə
ɪə
10
i /aɪ/
ɛi
ai
aɪ
ɑe
11
y /aɪ/
ɛi
ai
aɪ
ɑe
12
o /oʊ/
oː
ɞu
əʊ
əʉ
13
or /ɔər/
oː
ɔ
ɔː
o

Questions and formulas:
Question: What's the American pronunciation when the Australian is əʉ?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="əʉ"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,E2:E13="əʉ"),3))
Level: medium
Question: What is the 17th c. pronunciation when the british is əʊ?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="əʊ"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,D2:D13="əʊ"),2))
Level: medium
Question: What is the 17th c. pronunciation when the British is i and the long vowels are e /iː/?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1="i")*(A1="e /iː/")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,(D2:D13="i")*(A2:A13="e /iː/")),2))
Level: medium
Question: What's the British pronunciation when the American and Australian is i?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="i")*(E1="i")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,(C2:C13="i")*(E2:E13="i")),4))
Level: medium