Thanks Hans,

I tried to modify your example for preventing the capital-Th ligature but this doesn't seem to work. The 'fi' ligature is prevented, but 'Th' still appears as a ligature. This occurs with the original lowercase version too. Have I missed something?

```
\startluacode
     local demo = {
         name    = "demo",
         options = {
             {
                 patterns = {
                     fio  = "f|io",
                 },
                 words = [[ fioot fiots ]],
             },
             {
                 patterns = {
                     fio  = "T|h",
                 },
                 words = [[ This That ]],
             },
         },
     }
     table.save("oeps-fixes.llg",demo)
\stopluacode

\setuplanguage[en][goodies={oeps-fixes.llg}]

\setupbodyfont[ebgaramond]

\starttext
     fiets fiots fiats fioot This That
\stoptext
```
Ben

On Mon, 9 May 2022, at 14:03, Hans Hagen via ntg-context wrote:
> On 5/9/2022 9:56 AM, Denis Maier via ntg-context wrote:
> > Happens here as well, already on  ConTeXt  ver: 2022.03.12 17:56 LMTX.
> > 
> > By the way, this even happens without special fonts:
> > 
> > \blockligatures[Th]
> > 
> > \definefontfeature[default:blocklig][default][liga=yes,blockligatures=yes]
> > 
> > \setupbodyfont[myfont]
> > 
> > \starttext
> > 
> > \definedfont[Serif*default:blocklig]
> > 
> >      The This These are missing the `h'
> > 
> > \stoptext
> I'll fix it but it's not the way to do it in lmtx where we have
> 
> \startluacode
>      local demo = {
>          name    = "demo",
>          options = {
>              {
>                  patterns = {
>                      fio  = "f|io",
>                  },
>                  words = [[ fioot fiots ]],
>              },
>              {
>                  patterns = {
>                      fio  = "t|h",
>                  },
>                  words = [[ this that ]],
>              },
>          },
>      }
>      table.save("oeps-fixes.llg",demo)
> \stopluacode
> 
> \setuplanguage[en][goodies={oeps-fixes.llg}]
> 
> \setupbodyfont[ebgaramond]
> 
> \starttext
>      fiets fiots fiats fioot this that
> \stoptext
> 
> I just added (no upload) this
> 
> \startluacode
>      local demo = {
>          name    = "demo",
>          options = {
>              {
>                  substitutions = {
>                      th = "t|h",
>                      Th = "T|h",
>                      st = "s|t",
>                      St = "S|t",
>                      fi = "f|i",
>                  },
>              },
>          },
>      }
>      table.save("oeps-fixes.llg",demo)
> \stopluacode
> 
> \setuplanguage[en][goodies={oeps-fixes.llg}]
> 
> \setupbodyfont[ebgaramond]
> 
> \starttext
>      The This These fiets and thisthis thisfiets
> \stoptext
> 
> 
> 
> -----------------------------------------------------------------
>                                            Hans Hagen | PRAGMA ADE
>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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