portableapps
on SourceForge
Mozilla Thunderbird, P.E./Mozilla Thunderbird, Portable Edition 128.3.3/ThunderbirdPortable_128.3.3_Spanish.paf.exe
Mozilla Thunderbird, P.E./Mozilla Thunderbird, Portable Edition 128.3.3/ThunderbirdPortable_128.3.3_Slovak.paf.exe
portableapps
on SourceForge
Mozilla Thunderbird, P.E./Mozilla Thunderbird, Portable Edition 128.3.3/ThunderbirdPortable_128.3.3_Serbian.paf.exe