Saxe-Coburg and Gotha (German: "Sachsen-Coburg und Gotha" ), or Saxe-Coburg-Gotha, was an Ernestine duchy ruled by a branch of the House of Wettin, consisting of territories in the present-day states of Bavaria and Thuringia in Germany. It lasted from 1826 to 1918.
Sachsen-Coburg und Gotha is the correct German spelling for Saxe-Coburg and Gotha in modern German language. 
We cannot decipher whether the german language has changed from this time to now and the statement does not provide context for this. 
( z1 spell :ARG1 ( z2 string-entity :value "Saxe-Coburg" :op "und" :op "Gotha" ) :mod ( z3 language :name ( z4 name :op "German" ) ) :ARG1-of ( z5 correct ) :manner ( z6 language :ARG1-of ( z7 modern ) :mod z3 ) )