Is there not a standard gauge in Europe???

In most of it, there is standard gauge (1435 mm). However, the former USSR has modern Russian broad gauge (1520 mm), formerly Tsarist-Russia-held Finland the original Russian broad gauge (1524 mm), rail-isolated Ireland has a broad gauge also used in some other former British colonies including Australia and NZ (1600 mm), many mountain railways (and some trams) have metre gauge, and Spain and Portugal has Iberian gauge (1668 mm).

Spain has an ambitious plan to re-gauge its entire network to standard gauge, the first steps of which are to build all high-speed lines with normal gauge, and all line upgrades with special sleepers prepared for quick re-gauging.

_{*Lunatic*, n.
One whose delusions are out of fashion.}