TFW run services for the benefit of Welsh taxpayers including various connecting services in England not for the English, if English customers choose to board they must accept who the service is actually for, and the provision of an English translation is actually a generous concession. The eventual intention is to remove the English language from Welsh regions on a progressive basis as in the former Snowdonia and the elimination of foreign owned homes.
This is democracy being the policy of majority parties in the Senedd.
Not really.
The TfW franchise/direct award/operational area is Wales & Borders (it says that on the trains).
The accounting is done in Cardiff, and within WG control, but it is a cross-border operation with equal responsibilities to taxpayers and politicians on both sides of Clawdd Offa.
The Marches route is hardly "various connecting services", and every Cardiff-Wrexham-Holyhead service crosses the border 4 times.
And Network Rail is not devolved, so the underlying infrastructure is (bar the CVL routes) a UK government responsibility, with strong input from the WG in its TfW-operational area.
Likewise, GWR, Avanti and XC are UK TOCs with responsibilities on both sides of the border.
The bulk of TfW funding comes from Westminster to Cardiff in various tranches, very little of it directly from the Welsh taxpayers.