ばかりでなくNot only…but also, As well as

ばかりでなく and のみならず are both expressions used to convey the meaning of 'Not only (A)'. While both are formal, のみならず is even more literary. Both patterns can also be followed by noun + も to express 'But also (B)'. For example, 日本語のみならず、韓国語も話せる 'He can speak not only Japanese, but also Korean.' vs. 日本語ばかりでなく、韓国語も話せる (Same meaning, but slightly less literary in tone).

ばかり means 'only' or 'nothing but', emphasizing exclusivity, e.g. 甘いものばかり食べている ('He eats nothing but sweets.'). ばかりでなく means 'not only…but also', adding inclusivity, e.g. 甘いものばかりでなく野菜も食べなさい ('Don't eat only sweets, but vegetables too.').

だけでなく and ばかりでなく convey the same essential meaning of 'not only'. Both expressions are often followed by another noun + も, which gives the added meaning of 'not only (A), but also (B)'. The main difference is that ばかりでなく is more formal and appears primarily in written or academic language. In everyday speech, the だけ version is more common, particularly in the variant form だけじゃなくて.

はもちろん highlights an obvious example together with a more unexpected addition, e.g. 子供はもちろん大人も楽しめる ('Not only kids, but adults too can enjoy it'). ばかりでなく is more neutral, simply listing two things, e.g. 雨ばかりでなく雪も降った ('It not only rained, but also snowed').

ばかりでなく and をはじめ both introduce additional items, but their focus differs. ばかりでなく is neutral and treats both elements as equal, e.g. 彼は英語ばかりでなく日本語も話せる ('He speaks not only English but also Japanese'). をはじめ highlights the first item as the most representative, e.g. 校長先生をはじめ、先生たちが全員参加した ('Starting with the principal, all the teachers joined').

Both are fairly formal patterns which convey that something applies to more than one item, but they differ in nuance. ばかりでなく is a relatively straightforward 'Not only (A), but also (B)', e.g. 日本語ばかりでなく、韓国語も話せる 'He can speak not only Japanese, but also Korean.' In contrast, に限らず has a more specific nuance of 'Not limited to (A)', e.g. 学生に限らず誰でも入場できます 'Not limited to students, anyone can enter.'

Both are formal patterns which add new information or elements, but they differ in nuance. ばかりでなく is a relatively straightforward 'Not only (A), but also (B)', e.g. 日本語ばかりでなく、韓国語も話せる 'He can speak not only Japanese, but also Korean.' In contrast, に加えて has a more specific nuance of 'In addition to (A)', e.g. 日本語に加えて、文学も勉強することになった 'In addition to Japanese, I'll also study literature.'

ばかりでなく and だけでなく(て)～も are nearly identical in meaning, both meaning 'Not only (A), but also (B)'. ばかりでなく is the more formal expression, while だけでなく (especially in the alternate form だけじゃなくて) is more common in everyday speech. For example, 日本語ばかりでなく、韓国語も話せる 'He can speak not only Japanese, but also Korean.' vs. 日本語だけじゃなくて、韓国語も話せる (Same meaning, but more casual in tone).

Both formally express that something applies to more than one item, with different nuance. ばかりでなく is a neutral 'Not only (A), but also (B)', e.g. 日本語ばかりでなく、韓国語も話せる 'He can speak not only Japanese, but also Korean.' はもとより is more literary in tone, and implies that the first item is obvious and the second more noteworthy, e.g. 親はもとより先生にも感謝しています 'I'm grateful not only to my parents, but also to my teachers.'