BEREHOVE, Ukraine -
Under the watchful eye of their teacher, a group of students in western Ukraine used a scalpel and forceps to dissect a pig's heart during a weekend biology class. The lesson was taking place in Hungarian: the students, members of a sizable ethnic Hungarian minority, have become a focal point of souring relations between Hungary and Ukraine that threaten to derail key financial support for Kyiv as it fights to defeat Russia's invasion.
Hungarian Prime Minister Viktor Orban has long alleged that Ukraine's government is infringing upon the rights of those students -- and of the roughly 75,000 ethnic Hungarians residing in the Ukrainian region of Zakarpattia -- to speak their native language in education and public administration.
His government has blocked crucial European Union funding for Ukraine and threatened to impede the war-ravaged country's efforts toward eventually joining the bloc, bringing diplomatic ties to worrying lows.
The dispute over language is rooted in Ukraine's efforts to bolster its national identity after Russia-backed rebels took control of two regions in the country's east in 2014 and Moscow annexed Ukraine's Crimean Peninsula.
Aimed at combating Russian influence, but ultimately affecting other minority languages, a law was passed in 2017 that made Ukrainian the required language of study past the fifth grade, angering Romanian, Bulgarian and Hungarian minorities.
But in December, Ukraine amended its education and language laws to comply with the EU's membership requirements, and restored many of the language rights demanded by Budapest -- prompting a sigh of relief from the region's Hungarian community.
The legislative changes "essentially gave the Hungarian community of Zakarpattia the opportunity to ensure its own existence for another 30 years," said Laszlo Zubanics, head of the Hungarian Democratic Alliance of Ukraine, a Hungarian interest group.
Ukraine's government has "gone beyond the nation-building effort that characterized the past years, and now takes into account the interests of not only the majority nation, but also of all minorities and indigenous peoples living on the territory of the country," he added.
The legal changes that restored the rights of national minorities to study in their native languages are viewed by many ethnic Hungarians as a positive step. But Hungary's government has indicated it is not fully satisfied -- a potentially explosive sticking point as EU leaders meet on Thursday to try and break Orban's veto of a 50-billion euro ($54 million) aid package earmarked for Kyiv.
"The law adopted at the end of last year in Ukraine undoubtedly deserves respect. It stopped a negative spiral," said Hungarian Foreign Minister Peter Szijjarto on Monday, following a bilateral meeting with his Ukrainian counterpart in western Ukraine.
But, he added, "We don't see at all that the issue of national minorities has reached resolution ... We still have a long way to go."
Since Russia's invasion, Orban, widely considered to be Russian President Vladimir Putin's closest EU ally, has emerged as a consistent opponent of military and financial aid to Kyiv and sanctions against Moscow, often using the Hungarian minority to justify his lukewarm support for Ukraine.
Hungarians in Zakarpattia are largely supportive of Orban, but also back Kyiv's ambitions to join the EU. Yet Orban has expressed skepticism, commenting in November that EU admission was " light years away " and signalling that full language rights for Ukraine's Hungarians are a prerequisite for his support.
Zubanics, who endorsed an open letter to Orban in December urging him to lift his opposition to Ukraine's EU path, said he is optimistic, despite the tension between Budapest and Kyiv.
"In our mentality and culture, we consider ourselves European citizens," he said. "We are aware that this will not happen immediately, as it will be a long, sometimes instructive and sometimes painful process for everyone."
Hungary's government has provided generous financial support for the minority in Ukraine, seeking to bolster its Hungarian identity and connection to Budapest. It has simplified the procedure for acquiring Hungarian citizenship -- something Ukraine, which does not recognize dual citizenship, has opposed.
In Berehove, a small city in Zakarpattia around 3 miles (2 kilometres) from the Hungarian border, Orban's government helped establish a campus of the Matthias Corvinus Collegium, a conservative private educational institution which boasts 23 locations in Hungary and neighbouring countries.
The MCC has received endowments worth more than $1.5 billion from Hungary's government, and acts as a training center for what Orban hopes will be the country's future political elite.
As Hungarian students dissected a pig heart at the school's weekend biology class, part of a curriculum designed to supplement their Hungarian-language lessons in Zakarpattia's public schools, they asked questions and received answers in their native language.
MCC says it offers several hundred students classes in topics such as robotics, media and internet literacy that are not available at Ukraine's public schools in any language.
Milan Constantinovits, MCC's deputy director of professional affairs, said that in the multi-ethnic environment of Zakarpattia, "it is very important that the question of identity is well formulated ... Ninety percent of Hungarian students who come here are quite sure that they consider Hungarian as their primary identity."
Still, he said, the MCC strives to instill tolerance and respect between the region's cultures, and offers Ukrainian lessons for Hungarian students that learn it as a second language. Coexistence, he said, had long been a given, before broader conflicts enveloped the region.
"Very often, the ethnic tensions that enter this multi-ethnic space come from outside," he said. "The inhabitants who live side by side, the natives of this area, basically have no problems with each other. Many times this is an artificially generated flaring of tensions."
The meeting on Monday between Szijjarto and Ukrainian Foreign Minister Dmytro Kuleba -- their first since the war began in February 2022 -- as well as plans for Orban to meet with Ukrainian President Volodymyr Zelenskyy, suggest a partial thaw.
But Hungary's government has remained firm that despite improving conditions for the Hungarians of Zakarpattia, it is not yet ready to fully support Ukraine. That, Zubanics said, will require greater efforts from both sides.
"Diplomacy is partly high art, but at times it is more like theatre than real life," he said. "But regardless of this, we have to move along with specifics now, and I think there is much more in common between the parties than what separates them, but this also requires political will."