Help:Templates with multiple spellings
Templates should be made with subpages for each spelling standard you wish to include. The root page should then have a switch statement which takes an input with either the name itarpcznk or pcznklex, and passes all parameters to a different subpage depending on what the value is ("p" for Pisoweic and "j" for Junaic).
An example from Template:Kutigolne_zemla is shown below:
{{#switch: {{{pcznklex|}}}
| j = {{Kutigolne zemla/junaxles
| title1={{{title1}}}
| image1={{{image1}}}
| caption-image1={{{caption-image1}}}
| mysik={{{mysik}}}
| sztat={{{sztat}}}
| paxles={{{paxles}}}
| anolme={{{anolme}}}
| karszi={{{karszi}}}
| usi_tszas={{{usi_tszas}}}
| kot={{{kot}}}
| kot_ello={{{kot_ello}}}}}
| p = {{Kutigolne zemla/pisowaxles
| title1={{{title1}}}
| image1={{{image1}}}
| caption-image1={{{caption-image1}}}
| mysik={{{mysik}}}
| sztat={{{sztat}}}
| paxles={{{paxles}}}
| anolme={{{anolme}}}
| karszi={{{karszi}}}
| usi_tszas={{{usi_tszas}}}
| kot={{{kot}}}
| kot_ello={{{kot_ello}}}}}
}}