For each row, if the second column does not say "Testing 123456789 áéíóú" then it is not being decoded in an ISO-8859-1-compatible way.
iso-8859-1
utf-8
unrecognised
OSD_EBCDIC_DF04_15
OSD_EBCDIC_DF03_IRV
OSD_EBCDIC_DF04_1
IBM037
cp037
ebcdic-cp-us
ebcdic-cp-ca
ebcdic-cp-wt
ebcdic-cp-nl
csIBM037
IBM038
EBCDIC-INT
cp038
csIBM038
IBM274
EBCDIC-BE
CP274
csIBM274
IBM275
EBCDIC-BR
cp275
csIBM275
IBM277
EBCDIC-CP-DK
EBCDIC-CP-NO
csIBM277
IBM278
CP278
ebcdic-cp-fi
ebcdic-cp-se
csIBM278
IBM280
CP280
ebcdic-cp-it
csIBM280
IBM281
EBCDIC-JP-E
cp281
csIBM281
IBM284
CP284
ebcdic-cp-es
csIBM284
IBM285
CP285
ebcdic-cp-gb
csIBM285
IBM290
cp290
EBCDIC-JP-kana
csIBM290
IBM297
cp297
ebcdic-cp-fr
csIBM297
IBM420
cp420
ebcdic-cp-ar1
csIBM420
IBM423
cp423
ebcdic-cp-gr
csIBM423
IBM424
cp424
ebcdic-cp-he
csIBM424
IBM500
CP500
ebcdic-cp-be
ebcdic-cp-ch
csIBM500
IBM870
CP870
ebcdic-cp-roece
ebcdic-cp-yu
csIBM870
IBM871
CP871
ebcdic-cp-is
csIBM871
IBM880
cp880
EBCDIC-Cyrillic
csIBM880
IBM905
CP905
ebcdic-cp-tr
csIBM905
IBM918
CP918
ebcdic-cp-ar2
csIBM918
EBCDIC-AT-DE
csIBMEBCDICATDE
EBCDIC-AT-DE-A
csEBCDICATDEA
EBCDIC-CA-FR
csEBCDICCAFR
EBCDIC-DK-NO
csEBCDICDKNO
EBCDIC-DK-NO-A
csEBCDICDKNOA
EBCDIC-FI-SE
csEBCDICFISE
EBCDIC-FI-SE-A
csEBCDICFISEA
EBCDIC-FR
csEBCDICFR
EBCDIC-IT
csEBCDICIT
EBCDIC-PT
csEBCDICPT
EBCDIC-ES
csEBCDICES
EBCDIC-ES-A
csEBCDICESA
EBCDIC-ES-S
csEBCDICESS
EBCDIC-UK
csEBCDICUK
EBCDIC-US
csEBCDICUS
IBM00924
CCSID00924
CP00924
ebcdic-Latin9--euro
IBM01140
CCSID01140
CP01140
ebcdic-us-37+euro
IBM01141
CCSID01141
CP01141
ebcdic-de-273+euro
IBM01142
CCSID01142
CP01142
ebcdic-dk-277+euro
ebcdic-no-277+euro
IBM01143
CCSID01143
CP01143
ebcdic-fi-278+euro
ebcdic-se-278+euro
IBM01144
CCSID01144
CP01144
ebcdic-it-280+euro
IBM01145
CCSID01145
CP01145
ebcdic-es-284+euro
IBM01146
CCSID01146
CP01146
ebcdic-gb-285+euro
IBM01147
CCSID01147
CP01147
ebcdic-fr-297+euro
IBM01148
CCSID01148
CP01148
ebcdic-international-500+euro
IBM01149
CCSID01149
CP01149
ebcdic-is-871+euro