A Compendium of Sound Change Appliers

[Man in Space]

UPDATED 20 DEC 2025 (thanks Neonnaut)
UPDATED 1 FEB 2026 (thanks Vilike)
UPDATED 6 FEB 2026 (thanks Neonnaut)

This came up in discussion this morning and I felt it might be useful to share here as well:

• ASCA
• Brassica
• Command Line SCA
• Didelphis
• Featured Sound Change Applier
• Geoff’s Sound Change Applier (GSCA)
• HaSC
• IPA Zounds
• Lexurgy
• Lingua::SoundChange
• Nesca
• Onset
• phonix
• Phono
• Reversible Sound Change Applier (rsca)
• SCA²
• SCA 2.1/SCA++
• schcompile
• sound-change
• soundchange
• Sound Change Engine (SCE)
• Sound Change Transducer
• TriSCA
• Ursus
• Versatile Sound Change Applier (VSCA)
• Richard Wordingham’s Sound Change Applier

Honorable Mention:

• loanpy (Not so much an SCA proper but intended to be used to find cognacy via diachronics)

[Darren]

Brassica at the top as it should be

[bradrn]

Brassica at the top as it should be

I’ve never been happier to have a name starting with ⟨B⟩!

[zompist]

Coming soon: the AAA Aapplier of Sound Changes

[Man in Space]

Coming soon: the AAA Aapplier of Sound Changes

$70 yearly subscription but you get discounts at certain gas stations.

[alice]

Coming soon: the AAA Aapplier of Sound Changes

Pfft. *Real* sound change applliers have names starting with NUL!

[Zju]

Coming soon: the AAA Aapplier of Sound Changes

And its nemesis, Zzzound change applier

[Neonnaut]

Well there is ASCA and Ursus.

[Neonnaut]

And there is Kath The Dragon's SCA https://conworkshop.com/leashy/sce/

[Man in Space]

Added. Thank you!

[Vilike]

Looking through my 'Sound change appliers' local folder, I see Lee Hartman's Phono (apparently from the 80s).

Couldn't find online again:

• HaSC, a Haskell featural SCA by Christopher Bates (I wrote him here some years ago, no response)
• schcompile, written in Perl by Henrik Theiling
• Versatile Sound Change Applier (VSCA) apparently by someone from the old ZBB

[Vilike]

While looking for HaSC, I stumbled upon yet another Haskell SCA, sound-change by Owen Bechtel.

[Man in Space]

Updated. Thank you!

[Man in Space]

Updated to include Neonnaut’s Nesca SCA.