I can provide you the hungarian (magyar) alphabet, however i'm not sure you can fit that into your addon:
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A, Á, B, C, D, E, É, F, G, H, I, Í, J, K, L, M, N, O, Ó, Ö, Ő, P, Q, R, S, T, U, Ú, Ü, Ű, V, W, X, Y, Z
a, á, b, c, d, e, é, f, g, h, i, í, j, k, l, m, n, o, ó, ö, ő, p, q, r, s, t, u, ú, ü, ű, v, w, x, y, z
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Meanwhile you can learn a bit more about hungary here:
http://imgur.com/gallery/4TGU6bq