Pathway development manager Gordon Greer said: “Having broken into the Swiss national squad, Andi is keen to play regular football ahead of this year’s World Cup in Qatar.
“We cannot guarantee him that here, so this move gives him the chance of that, while also continuing his development.
“We wish him well for the new season, and will be monitoring his progress throughout the campaign.”
The Swiss international spent last season on loan in the German Bundesliga with FC Augsburg, where he made 19 appearances, scoring twice.
He joined Albion after a prolific campaign in his homeland, scoring 22 goals in 37 appearances in all competitions, as Lausanne were promoted to the Swiss top-flight.
Check out the latest Premier League transfer speculation below...
5. Udogie price revealed
Udinese would consider Brighton target Destiny Udogie if an ‘irresistible’ offer of £16.7m was tabled. (Tuttosport) | Getty Images
6. Spurs lead Zaniolo chase
Tottenham are continuing talks with Roma over a move for Italy international Nicolo Zaniolo, and currently lead the chase for the midfielder. (90min) | Getty Images
7. Hammers progress with double deal talks
West Ham are progressing with talks over Lille midfielder Amadou Onana and Burnley’s Maxwel Cornet. Leeds United and Wolves are among the clubs who are being linked with a move for Cornet. (90min) | Getty Images
8. Toon have Harrison bid rejected
Newcastle United have had a £33m bid for Leeds United winger Jack Harrison ‘refused’. The Whites are holding out for closer to £39m. (Santi Aouna) | Getty Images